I drilled one hole (about 1/2"? I forget) through the plastic near the amp to route the wires behind the plastic. There's actually a bunch of extra wire hiding behind the plastic.
rka, how did you fix your box to the truck? The plastic panel on the passenger side is actually holding my box in place, the box is sandwiched between the plastic and the back wall. Seems to work fine.
I'm loving the wheels. I might get those in the future if u don't mind me biting ur style. Probably with some trail grapplers.