How do I get the data from an input field within a collection - from only one specific row?

Hi!

I have this problem. I have created a data structure Customers - Orders - Goods.

I made an interface in the form of collections, where I displayed the structure of the “relationship” of these elements (it turned out to be a “table in a table”). I also made it possible to add a separate record inside a cell of the collection, that is, I can add an Order inside the row of the desired Customer. But I cannot get the values of the Order input fields in the row where I enter the data. When I create an automation on Insert Record, I don’t find the input fields I need.

I have made a video file in detail.

How do I get the data from an input field within a collection - from only one specific row? What do I need to do to make the We-Web “understand” from which row I want to pass the input field values to the database row?