Queries :: Allocate A Record To A Place In Table

I've got a table [Devices] with some number fields that are already in there for another purpose.

In a different exercise I will manually collect more information from a layout drawing and give each piece of information I collect a unique reference(this could be as simple as a PK ref) and attach a "type" and "location" . This will be done randomly in a batch exercise any time.

I need to put the above into access and hold it until I choose to individually allocate these records to the number field that already exists in the [Devices] table.

I would like to add "say" a combo/List box in [Devices] where I could search for the PK Ref which when selected against a number would populate the [Devices] table with previously unallocated information. I would like to keep any combo/List box down to unallocated PK refs to make records easy to find. I guess this a kind of cut and paste exercise.