1972 Demon Accel Cable Firewall Grommet ?

There is just a foam gasket on the back of the accel padal where it attaches to the inside of the firewall,The flange on the accel cable end is a lot smaller than the firewall hole.It just looks like there should be some type of grommet/seal to fill in the difference.But maybe the foam gasket is suppose to do the job?