Bryan,
This may not apply to your car, but a number of early 70 Air Grabber cars did not have the hole and the grommet. The wires came out just behind the voltage regulator. These may have been more prevalent on California cars, but that is speculation on my part. My 70 Air Grabber is like this, so I don't need or use the grommet.
Obviously, if your car has the hole drilled for it then you need the grommet, but I just figured I would provide the information to you and other members just in case. Below are a couple of pictures of a verified original N96 car without the hole drilled FYI.
Hawk
This may not apply to your car, but a number of early 70 Air Grabber cars did not have the hole and the grommet. The wires came out just behind the voltage regulator. These may have been more prevalent on California cars, but that is speculation on my part. My 70 Air Grabber is like this, so I don't need or use the grommet.
Obviously, if your car has the hole drilled for it then you need the grommet, but I just figured I would provide the information to you and other members just in case. Below are a couple of pictures of a verified original N96 car without the hole drilled FYI.
Hawk