How to use the button to automatically add links?

Hello! I tried to solve my question using the child table, but it didn't work out.

I'm trying to solve the issue with filters, but it's not working yet either ...
Please help me sort it all out!

1. There are tables "Vacancy" and "Candidate".
2. "Vacancy" is linked to "Candidate" as 1 record in "Vacancy" : N records in "Candidate".
3. For a better display, 2 more links have been created on the "Vacancy" form (tables: "Candidate1", "Candidate2") with "Candidate", in which different filters are applied.
4. How to use the button to automatically add links to "Candidate1" and "Candidate2" from "Candidate"?