what the light switch looks like [if ya got the right one] - the dash lights connect to the terminal at the front right [of the pic] near the copper part - the rotary wire rheostat is the dimmer for them .... the fuse on the back is for the whole light system - the spring [relay-like] contacts on the sides of the sw are bi-metal circuit breakers for head and tail systems that open if the circuit overheats, close again when they cool, dash lights not seperately fused
the ign sw has a 'protrusion' on the side with a hole same as the ones on the gauge cluster for the socket .... I think some of the originals didn't have it, or maybe it was early 3rd party replacements that didn't
Bill