I'm close to getting the '63 operational. I'm ready to place the reworked steering wheel, but need to assemble the items, and switch h for the horn operation. Into it apart 7 years ago, and missed taking pics of it, before dis-assembly. I'm not finding any specifics in the FSM on this. Does anyone have pics, diagrams, or schematics of this ? The upper switching, the black plastic round, with the 3 buttons is in question ? It would be a Great Help on this. Thanks for any input on this...