wiring

Anyone have any experience with the best place to pass wires through the firewall in an 03 tj with an automatic transmission? Need to run some wiring for switches, and it has to be large enough for a cb antennae wire to go through.

I just ordered a new stereo head unit that has a big display and comes with a backup camera. I dont want to mount it behind me as I will never use it so instead I want to mount it right under my front bumper facing the front so I can use it on dry off roading trips to see any obstacles i might...