How to upload additional product characteristics of the nomenclature to the infoblock properties I need in Bitrix?

Question

1C-Bitrix

We deployed the site on a template, we are uploading from 1s, in the "XML field name" field we tried to enter the symbolic code and the field name, but when uploading, it still creates its own new infoblock properties and uploads it there.
And it is necessary that it writes to previously created properties (which go in the template).

It is necessary to load these values ​​from the product card there:

As I understand it, you need to enter the correct XML name.

Where can we get "XML field name"?