Fuse Box

I'm not sure. I know its phillips drive, 1/4-20 maybe? After a bracket that bolts to the dash itself? Again I'm just not sure.
The sad part is there are only a handful of 20 amp fuses in it. The dang reverse lamps didn't get fused until 1968. Owners would back into a tricycle and shut down the entire car. Good luck with it.