There's a rubber grommet for the wires going down to the transfer case under the driver's seat. I ran mine from the bed, down along the framerail ziptied on the inside through the grommet into the cab.
Too late now, but I removed my engine bay fuse box, drilled a 1" hole, installed a 3/4" hole grommet, and ran my wires through there. Back before I did this, I ran my accessory wiring through the steering grommet.....until one came in contact with the shaft...