Sir, The OD cable goes through a hole in the Firewall. Open the hood and look at the driver's side fresh air vent. There are two holes in the firewall directly under the horizontal seam that joins the Firewall to the Cowl. The holes are on either side of the vent higher than the vent. Looking at the steering wheel the hole on the left is for the speedometer cable. The whole on the right is for the OD cable. Feed the cable from the inside of the car to the OD cable bracket by the transmission. To make sure your OD cable is the correct length get one from Tom, our host.