i spliced one tap into the ground and the other into the power of each bulb, you have me thinking about the heat now, i just electrical taped pretty much each side together and its just floating above the metal headliner.

 

I really have no idea if it's anything to be concerned about, just curious since the foam behind the head liner is up there, I think I saw v-leds website selling little 'brackets' to mount the resistors on so they're not floating around..

 

i have mine just "hangin around" and they have yet to cause problems. ive even taken the lights back out and checked them out after about 2 months of use and they are still working fine