If standard Document-Link doesnt work

Hi
I have two custom doctypes : Doc-A and Doc-B

I want to create a link in the “connections” tab on Doc-A, that will link to Doc-B.
But I cannot use the standard Document-link, because Doc-B does not contain
a field called “doc_a”.

Is there a way to do this ?

Please chcek this.

Thank you @NCP

Appreciate your help !