New Forms: Primary Street Address

I had so many field errors when I tried to upload an existing application from the legacy Forms Manager. So I decided to build an application from scratch. I cannot find a way to add the fields for City, State, and Postal Code. I found this instead:

Form field: Primary address (bbgm__Organization__PRIMARY_ADDRESS)

Does this field have all the other fields grouped together? If so, how do I see that on the backend to determine if all the fields we want are captured in the grouping? Also, after reading some posts, it looks like there is another feature called NPO Connect where the applicant finds their org with a Tax ID lookup (not sure if this is done at the login registration stage or when they begin an application). Anyway, I'm curious how NPO Connect is using the applicant's data for address fields in the application. I would hope that NPO Connect can be explained a bit more and have the ability to be turned off if it is not meeting our needs.