CB antenna coax install

[67sss]

wondering if anyone has tried putting a CB and antenna in. I'm going to be putting a setup in, as I'm going on a west coast trip in a week. I have a 2022 chevy high country 2500 4x4 diesel crew cab standard bed. Hoping someone could tell me a good access hole to run the cable through. I'll be using a 4' firestick antenna with a roof magnet mount. I'm comfortable hooking the radio power, but don't want to cut a hole for the coax.