Hy 1951Chevy1Ton, if you run the wire from the ignition switch to the ballast resistor, then run another wire from the other terminal on the ballast resistor to the positive terminal of the coil (if negative ground). The wire from the small terminal of the starter switch can be run to either the output terminal of the ballast resistor (the one with the wire going to the coil)or directly to the coil positive terminal, that is the way it was designed to be, hope that helps.