Reference another file cabinet for a select list

Is it possible to have a select list that is pointed to another file cabinet within the same system? If so, how do you do it?

File Cabinet A has a "Client Name" field.
File Cabinet B has a "Client Name" field. -> You can think of this cabinet as the master record.

I would like File Cabinet A to use the internal list from File Cabinet B.

Just create and external list in "Indexing Assistance" ..  that points to the Cabinet B and select the fields that you want in the list..