I've run a bunch of wires into the cab in about the same spot as doughboy did. I think... I used the hole with the rubber cover and just cut a slit into it and ran everything through there. That way it kind of re-seals itself with no effort. I know I didn't have to drill any holes or anything, so I'm pretty sure that's what I did on this truck. I've done a few trucks and just can't remember exactly what on what one.