While you have the mast down you might as well do some spreader
lights also. There should be a wiring conduit inside the mast to run the wires up for the instruments and light. The spreader
lights have to pulled outside of the conduit. Before you pull them wrap a long wire tye around the bundle and don’t trim it off. This will keep the wires from clanging around inside the mast. I ran the wires for all of the external
lights to some switches mounted on the instrument panel so I can turn them on from the cockpit.
Mike T
E-29 Zephyr