How to get data from opencart?

Question

opencart

In the payment system file controller (catalog/controller/payment/paymentsystem.php), the order id data is taken from the oc_order table and sent to the payment service for receiving payment
'custom1' => $order_info['order_id'],
I need to deliver the model cell from the table oc_order_product
'custom2' => $order_product_info['model'],
This doesn't work