FAQ to the FAQs
Welcome to our madness....
You're going to tap into the HDD connector of a spare ATX PSU.
Yellow is +12v and black is ground. (red is +5v and not needed for this)
The attached diagram should help you out with powering the unit in the house. To get power tot he M2-ATX, you'll need to jumper pins 13 & 14 of the ATX power connector that plugs into the motherboard. The switch will simulate turning ignition on/off.