That thin plate holds the cable in place at the firewall on the inside. Follow the cable from the pedal to the firewall and you will see where your old one is.
It goes inside the car where the cable comes through the firewall. Unsure if it's just a grommet to seal the engine area off from the inside, or if it helps stablize the cable at all.
I've circled it in this pic when i had my dash off. You can see it behind the throttle arm.
So its supposed to just hook onto the cable where the sleeve comes through the firewall and sit flush on the firewall? I'll try and throw it on when I get a chance.
im in the middle of a 4 to 8 swap and im swaping cables but im unsure on how to do it where is it conected inside the car so i can take it off thanks and sorry for the high jaking lol