Creating a Column that Moves to Another Board

I am using Monday as a CRM for a small insurance business. I want to have a column in the Lead Board for “Source”. I want that to be a dropdown so the source can be selected. I also want that “Source” column to MOVE to the Contacts Board. I can create a column on both boards, but I cannot seem to the information in that column on the Lead Board to move with the Lead to the Contacts Board. Any suggestions?