Forms :: Form With Tabs But Separate Sources

I am creating a database in which to store my data collected in my research. I have 8 tables that are linked by a SampleID number. I have created a form which has tabs, the first tab contains the information required for entry on table 1; how I am going to add the controls from table 2 onto the second tab.

I know how to make additional tabs and I have created a separate form for table 2 with the form wizard, cut and pasted the fields into the second tab on my first form BUT how to establish the source for those controls back to the second table. To make matters worse (of course not to be too dramatic here) I can see the other table in my Field List of related tables.