The part that plugs into the harness where the switches mount to.Describe what you mean by switch boards?
Will doLooks like a fun car , good luck with it. Post pics of can install with controller o.k.
I just did the contour fans with the Dakota Digital controller and I LOVE it. The controller is awesome, I can adjust through my cell phone via bluetooth.Thanks,I'm thinking about doing those contour fans just don't know what controler.