There are actually three wires that have to be hooked into the car power, one of which Mitch sends to you and you clip into the 4-port plug. You plug it in like this:Originally Posted by Bugbyte
Using this handy clip he also provides:
Assuming he sent you a red wire (mine was actually blue), it goes:
Yellow - Constant 12V
Red - Accessory 12V
Black - Ground
Otherwise, great FAQ.