Connecting User Profile fields across forms

Hi there,

I’m trying to achieve the following and hope you can guide me in the right direction.

I have a site that uses S2 Member and UsersWP(of course).
There are two user registration forms, one for each of the above.

I would like to be able to capture user profile data on the S2 membership form(paid membership) and have that info properly assigned to their profile.

What’s the best way to achieve this?

I have these brief resources from S2 on how to access the field data but I’m unsure what to do with this as it pertains to UsersWP
– https://s2member.com/kb-article/user-custom-fields-via-php-code/
– https://s2member.com/kb-article/gettingsetting-custom-registrationprofile-fields-configured-w-s2member/

I’ve tried assigning the field key generated form the USerWP form builder to the custom field in S2 but that doesn’t seem to work.