Installing a w/b o2 on my 94 Camaro lt1 auto. I welded my bung between the y pipe and front of the cat. I'm tried looking for an access hole to run the cable into the car. I can't seem to find one. I hate to drill a hole if possible. Is there a factory plug somewhere? thanks

 

passenger side, behind the pcm, the wiring goes through a rubber grommet there. I just made a hole in it and run my power for the amps through it.