Dude, you bought a stellar and are having it installed?
Thats nuts. Specifically, what do you need to know? Just how to move to LED to someplace like the mirror?
To do that, cut the wire on the LED and extend it with any wire thats the same guage from radioshack. With the glovebox off, you can route it out of the side and under the weather stripping until you hit the pillar. You can with keep going under the weather stripping or put it uner the trim. Thats harder, but probably worth it. Either way, at the top, stugg if above the headliner and run it to the mirror. Take of the sunroof panel, drill a small hole, push the wires though, remove the mirror, drill the hole, use silicon to secure the LED, and you done.
<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>