Old air products dual electric fan wiring

[jgmc]

I have a 10 plus year old electric fan set up from old air products. I have a question for anyone that has this same set up about how it’s wired up.
Can anyone help? I had mine main fan coming on with a temp switch in the block and the second comes on with the adjustable dial switch. I want to wire the main fan to come on with the ignition switch but not sure wire the wires go that are on the 3 prong plug on the lower drivers side. Please help