Boost controller removal?
 

I have an HKS EVC boost controller that went bad and I can't get parts for it anymore. I need to remove it but have a question about removing it.

Coming out of the unit inside the car, there are 2 harnesses behind the steering column. One harness has just a red and a black wire. The other harness has about 8 wires. If I unplug them from the boost contoller is there something I need to plug back into them? Or are they only used for the HKS and I can leave them unplugged?

As you can guess, I didn't install this, so I need some help. Thanks.