Its in the assembly manual, under RPO U73 page A1. Its a 1.12" diameter hole, 114.25" back from the firewall, and 28.94" from the centerline of the car. There is a .14" wide, by .12" long notch extending from the hole at a 165 degree angle ( about the 5 oclock position) from straight ahead (or 75 degrees from perpendicular to the cars centerline)