ballast resistor

You can do away with the ballast resistor. The blue wire that is on it and is hot from the ignition switch can be used to turn on the box. You connect the small red on the box to the old ballast blue wire which turns the box on and is tied to the positive ignition souce when in the start and run mode.

The only problem with that is that the brown wire will be hot when turning the starter, and then engine wont start until you move the key back to the run position, so it will be tricky to start. at least to my understanding that would be the consequence.