What Grumpy said! Moreover, simply call Brake Buddy Tech Support. They'll send you a kit, free. Quality Wire, Fuse with Holder, Connectors, a very solid Socket with bracket, and even the screws to fasten and a few Zip Ties to keep it neat. I called and just last week installed the kit they FedEx'd to me. I was able to punch a hole in the edge of a wiring harness grommet and get the wire through.
BB needs a "solid" 15-Amps and the Controls draw more power than the Compressor. This means it can act stupid on low voltage even if the compressor seems to run normally. The Kit is robust enough to carry a 20-Amp fuse and bring all that to the socket. The "power outlets" in newer cars are 10-Amp and on skinny wire. BB'd rather send a free kit and preclude power supply problems than have you calling with problems.
Depending on the toad, you may still need to pull a fuse. If you'll have to do that, buy or make a switched fused wire. Put where you can reach. Put it where you can reach and out of sight then BAM! Poor man's Anti-Theft Device.