Array from JS to App Connect

[Teodor]

Looks to me some code is missing here. Don't you do anything like:

records.push(record);

inside the forEach, which is missing from the code you pasted?
Anyway here it's explained how to access js values from App Connect:

Using App Connect with JavaScript Functions

In some cases it's required to read a JavaScript variable or object values and use them in App Connect. In other cases it's required to use a dynamic App Connect expression in your own custom JavaScript functions. Although we don't provide a visual interface for these operations, both are possible with App Connect. We will show you a couple of simple examples, which show you how to do this but it applies for any complex function you might be using. Using App Connect Expressions in JavaScript…