I have seen this in some ads for camaro's for sale lately. It says "has original factory R/S hole in firewall. What hole are they referring to? I can't remember if I ever knew this. Is it for the wiring? I know that back-up lights in rear valances for R/S cars should be punched, not cut out, and the wiper motor, what else should be present for original factory Z/28 R/S cars? in 69"..Thanx.....Danny