Retrieve UUID and insert back into Supabase

Hi all,

I'm a newbie to Flutterflow, Supabase and backend databases in general - so go easy on me 😄

I have an UUID column in a Supabase table (say 'Table 2') that is a ForeignKey to a different table's UUID column (say 'Table 1). I'm looking to retrieve Table 1's UUID and insert it into Table 2 - but I can't for the life of me workout how to retrieve Table 1's UUID and insert into a row via Flutterflow.

Please, any tips! This seems like an incredibly basic thing to do as I'm just looking to connect two foreign keys, so I wonder if I'm approaching it completely wrong.

Thank you!