I'm putting a new head unit into the truck (2000 reg cab) and I'm adding a backup camera and sirriusxm where's a good place to get the wiring through to the interior\exterior of the truck?I need to take an rca cable for the camera and the xm antenna wire through someplace but nothing is jumping out at me I'm actually thinking of drilling a small hole and putting in a grommet and sealing it up with marine glue between the cab and the bed. Good\bad idea or other thoughts?

 

E-brake cable is good, transmission cable if automatic, these both have grommets in place