New to forums, looking for assistance on wiring and am completely novice to wiring.

I am a ham radio operator and am wanting to wire up a radio to my Trailblazer. I'd like to know where I can run the wiring and the antenna coax (mounting the antenna to the hood).

Is there a pre-fabricated hole or is there some area where wiring is already fed that I can run my wires through between the cab and the engine/firewall?

I plan to connect to the battery direct rather than through the cigarette plug.

Any suggestions or web sites to suggest are appreciated. Thanks in advance.