This powered MB connects to the Cruise Commander using the three position plug on the top right, track power, ground, and serial data. You need a 3-pin to 4-pin cable. Conveniently, the Cruise Commander or AC Commander comes with a suitable cable, you just need to remove the pins from one end of the 4-pin to 4-pin cable and use a 3-pin connector shell.
If you connect a chuff switch to the trigger and DC common, do NOT connect either wire of that to frame ground, you'll release the magic smoke. I normally feed the chuff into the Cruise Commander and let it come over on the serial data line, easier wiring job.
