I made up these dummy batteries to hold the power supply leads in the battery holder. I used alligator clips, but they pop off, and they can’t be used when the case is on.
I cut off short lengths of wood dowel, and drilled holes for the screw and for the wire to pass through. The contacts are small #3 sheet metal screws to hold the wires. The wires and/or dowels should be clearly labeled with the polarity.
I still have to paint them with clear varathane sealer.
