How to add a shipping method to an order?

Question

Drupal

The site on drupal and on it an online store through ubercart. I tried to search in api, but I didn’t understand how to transfer the delivery service to the order. I want to transfer the delivery service to the order through the script.

//Загружаю заказ
$siteOrder = uc_order_load($record['order_id']);
//Затем заполняю поля, но среди них я не нашёл типа доставки
$siteOrder->billing_ucxf_tracking_number = $order['delivery']['data']['trackNumber'];

tried to display the contents of the $siteOrder variable

Array
(
    [date-time] => 2016-11-13 19:20:08
    [0] => stdClass Object
        (
            [order_id] => 14996
            [uid] => 6955
            [order_status] => order_delivered_to_postoffice
            [order_total] => 699
            [product_count] => 1
            [primary_email] => [email protected]
            [delivery_first_name] => Дмитрий Витальевич
            [delivery_last_name] => Бобков
            [delivery_phone] => [phone]
            [delivery_company] => 
            [delivery_street1] => Ул.Фурманова д.37 кв.27
            [delivery_street2] => 
            [delivery_city] => Ковров
            [delivery_zone] => 112
            [delivery_postal_code] => 601901
            [delivery_country] => 643
            [billing_first_name] => 
            [billing_last_name] => 
            [billing_phone] => 
            [billing_company] => 
            [billing_street1] => 
            [billing_street2] => 
            [billing_city] => 
            [billing_zone] => 0
            [billing_postal_code] => 
            [billing_country] => 643
            [payment_method] => cod
            [data] => Array
                (
                    [new_user] => Array
                        (
                            [name] => dskrezhetov
                        )

                    [complete_sale] => new_user
                )

            [created] => 1477158057
            [modified] => 1478412905
            [host] => 176.215.228.82
            [currency] => RUB
            [uc_mailchimp] => 
            [products] => Array
                (
                    [0] => stdClass Object
                        (
                            [order_product_id] => 146752
                            [order_id] => 14996
                            [nid] => 257
                            [title] => Бамбуковая поперечная флейта
                            [manufacturer] => 
                            [model] => 0477
                            [qty] => 1
                            [cost] => 0.00000
                            [price] => 300.00000
                            [weight] => 30
                            [data] => Array
                                (
                                    [attributes] => Array
                                        (
                                        )

                                    [shippable] => 1
                                    [module] => uc_product
                                )

                            [order_uid] => 6955
                        )

                )

            [uc_discounts_codes] => Array
                (
                )

            [quote] => Array
                (
                    [method] => flatrate_17
                    [accessorials] => 0
                    [rate] => 399.00000
                    [quote_form] => 
                )

            [information_ucxf_punkt_samovyvoza] => 
            [information_ucxf_vremya_dostavki] => 
            [information_ucxf_okon4anie_dostavki] => 
            [information_ucxf_date_recieveing] => 
            [delivery_ucxf_confidencialnost] => Мы гарантируем, что Ваши личные данные сохранятся в тайне и не будут использованы для рассылки  спама.
            [delivery_ucxf_confidencialnost_zapis] => Нажимая на кнопку "Далее" Вы соглашаетесь, что Ваши персональные данные будут записаны, и исполнение Договора Офёрты.
            [delivery_ucxf_sms_soglasie] => 1
            [billing_ucxf_tracking_number] => 11171005007441
            [billing_ucxf_tracking_number_b2c] => 
            [billing_ucxf_tracking_number_dpd] => 
            [line_items] => Array
                (
                    [0] => Array
                        (
                            [line_item_id] => subtotal
                            [type] => subtotal
                            [title] => Сумма
                            [amount] => 300
                            [weight] => 0
                            [data] => Array
                                (
                                )

                        )

                    [1] => Array
                        (
                            [line_item_id] => 28695
                            [type] => shipping
                            [title] => Доставка почтой по России (при наложенном платеже почта взимает +5% от стоимости), 8-28 дней
                            [amount] => 399.00000
                            [weight] => 1
                            [data] => 
                        )

                )

        )

)

How can I add a shipping method? or did i miss the index with shipping method?