Hard wire a Roady XT

I would like to know if anybody can help me. I got a roday XT and I would like to hardwire it to the fuse panel so, when I shut off my car it shuts off. On the docking unit it says 5volt and I would like to know what I will need to do to hardwire it to the fuse panel. I know I will need a resistor but, how to I determin which size and which fuse location should I use? Thank You

just use the cig lighter plug that came with it and solder to the pins on it. The tip will be your +12V and the sides will be your ground; or you can go to the autoparts store, get one of the cig plug splitters and cut one of the female ends off and use the bare wires to do your hardwiring. Life moves pretty fast; if you don't stop and look around once in a while; you could miss it.