DC 12v+ is available from any red wire in the harness. Most of the wiring should be 18 gauge or larger, and a piece of 18 gauge 3 feet long will handle up to 240 watts (40 amps) at 12 volts. A 6 foot run will handle 144 watts. Consider the entire length from source to load as you select which wire. The Baja Designs (?) adapter plugs into the harness connector for the GYT-R tuner on the YZ-F.Good to know, unfortunately it was a Ktm harness so I had do butcher it, they only had to work once so I could get a plate.