The Tandy Terminator for the Model II/12/16 also fits the 16B and 6000, although those machines probably don't need it. The "Big" Tandy computers (the ones with the 8" drives) had both at least 1 internal drive and could be connected to an external drive expander. When the external drive expander was not plugged in, you were supposed to plug in this terminator into the external port.

They always get lost, so I made a replacement. Designed to be low profile so the machine can be moved safely with it left in. Hole in the middle allows for a case to be mounted or the terminator to be zip tied to the machine when not installed.