There should be a spring loaded button sticking out of that piece about 1/2 inch or so that rubs the ring on the bottom side of the adapter. It is not something you can really replace on its own very easy though. You pretty much have to take the whole turn signal switch assembly.
If memory serves correctly you have the other part figured out. I think that wire is just soldered to the ring on the adapter.
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95 Isuzu Trooper Daily Driver
86 Isuzu Trooper reliable backup
77 LUV 2wd stock beltway blaster (resting)
79 4x4 LUV project: 2.6L, 5spd, 31s (eventually)
MEPR: Man, my 4x4 makes all other LUVs look good
