Hello everyone, I have what may seem to you like a dumb question. I just purchased (4) LGB #67403 ball bearing wheels sets with pickups and (4) 67419 Solid Steel wheel sets so that I could add lighting to two passenger cars. Is there a correct way to install the ball bearing wheels with pickups? What I mean is should I use them to the outer most part of the car or use them on the inside set of wheels. Also, does anyone have any pictures that show where they drilled the holes in the bottom of the car and where you routed the wire to the wheels. I want to do this the right way the first time. Any helpful information would be greatly appreciated.