if you can find one, then all you have to do is find a power source. I suggest you try by tapping the courtesy lights by the sunroof for power. Take care not to use the sunroof wires though. the motors aren't very tolerant and I wouldnt want to pull any more more power away from it.
<span style='color:gray'><span style='font-family:Courier'>1995 e36 3 Series RIP
1999 e46 3 Series BURN IN HELL
2000 MR-S Roadster= Current</span></span>