A single wire runs to the glove box light switch.
54 Chevy glove box
54 Chevy brake switch
54 Chevy coil wires
Two wires run to the break light switch under the car. I vaguely remember adding the aluminum foil, when I was 19 years old, as a quick fix for some problem. Kids!
Here's a couple more important wires in the engine compartment--brake switch and the coil.