There are two fuses on a 1934.One is located on the back of the head light switch.Covers all lights except the brake light.The brake light hot wire comes off the ignition switch and is "hot" only when the switch is in the ON position.The brake light fuse is in a fuse near the Ign. switch.The wire runs on down to the brake switch and from the switch runs back to the brake light.It really dosen't travel under the hood beyond the lower firewall and had no connectors built into it.
If you have a "mystery" wire with a bayonet connector under the dash I would suspect that it is the brake fuse connector and is disconnect from its "other half".There should be "half" that comes off the Ign. and the other "half" going to the brake light switch.
The reason the brake light wire is connected thru the Ign. switch is to prevent the brake lights from operating when the switch is off.This is due to the fact that in 1934-35 the brake pedal is depressed when the parking brake is applied.
I changed this post three times-hope it still makes sense.
