EMPTY TERMINAL BOTTOM OF 67 CUDA HEADLIGHT SWITCH

Ok, the block below the headlight switch is the fuse block?
A yellow wire on the dash is either part of the dome light circuit or the starter wire (maybe others).
Any ground wires (very very few) are typically black with a ring terminal and screwed to sheet metal.
The fuse block has a couple terminals on the backside, one is hot all the time, the other is on the key (accessory).


Alan