I started to light my passenger cars today. I cut 12 SMD LEDS from the 16ft strip I bought. I glued them to the car' roof and solder on a mini connector in case I wanted to detach the roof later. I wanted to use the mini plug connector but you really don't have to use one. You cannot solder the connecting wires to the Walther's rail pick ups tabs so I had to glue them on. The spring steel they use for the pickups cannot be soldered. The car looks great all lighted up. Now 10 more to go.