No idea if this is helpful, but here's how mine looks.

https://goo.gl/photos/do4KZ4UoMunTtjJf8

The resistor is on the Empty side of the dial. Can't help you on the size or thread count for the nuts.


1955 First Series GMC 250 1-Ton Panel
In the Gallery
Mr. Hedgehog - Follow the build
If you can't laugh at yourself, I'll laugh at you.