Wiring harness needed

I am doing a holey HP in my 2001 Cobra I was wondering if I can get rid of all the wires behind the dash on the right side of the car where the pcm was bolted I wanna keep the interior working and the lights and indicators working
IMG_6925.webp

I wanted to run my holey wires thru that grommet can I just get rid of those wires thanks?