Thanks for the replies. The C-clip above the accelerator pedal has been removed. The cable seems to be hanging up on a rubber grommet but I am not sure. I kind of tore it trying to pull it off the cable. This is on the inside of the car. On the outside firewall there is a diamond shaped bracket with two bolts. I removed the bolts but the bracket is tight against the firewall. The whole area has been painted so I can't tell if the bracket is welded onto the firewall or there is simply some sealant around the edge. I will try to find this out tonight.