Clean 12v switched source that is hot cranking and running

I'm surprised it didn't come with a relay in the wiring harness as the Holley Commander 950 I have does, and I recall even their earliest Pro-jection 2D did. If so, just connect IGN (blue) and IGN2 (brn) together and run that to the relay command wire. You find those wires at the ballast resistor. You can keep the factory female connectors and make a wire jumper w/ male 57 terminals (spades).