Yandex Map icons on wordpress?

Question

HTML

You need to insert a map on the site with icons.

Examples:
webmap-blog.ru/bez-rubriki/dobavlyaem-metku-na-kar...
https://tech.yandex.ru/maps/jsbox/2.1/plcemark

The problem is that I don't know how to insert it specifically in my case. In the screenshot you can see the field where I can insert. I tried already, nothing happens. I don't quite understand the error.


What can be done?

I saw this plugin https://ru.wordpress.org/plugins/yamaps/, but I don't have the usual field where I need to insert the code from this plugin. I don't know if it will work.

Previously used this code, it works, but I need icons.

<iframe src="https://yandex.ru/map-widget/v1/?um=constructor%3Add1b746e14cd72db481b02c891d5d052064f21db4fb5109b322a6a1452111673&source=constructor" width="100%" height="495" frameborder="0"></iframe>