i used LED's for the lights which I got off of ebay for really cheap.
The roll bars had clear plastic which I took off to put the led in then drilled two really small holes for each of the wires sticking out of led. After I got all four in then i soldered wires to the leads (good idea to keep the right color on the right side of the led other wise it wont work)

For the body the batteries are inside by the back window and i have a switch so i can turn them on and off.
The ones in front of the truck I have to plug and unplugh the batteries every time until I find a good spot to mount a switch. I made them at different times so they have seperate batteries, I will rewire the lights when I get a new body that actually looks good.

This is the best I could do to show how to wire the leds until I get some pictures: