I just installed a new firewall pad (half-rubberized jute). I am trying to remember how the "rear lights" harness mounts to the inner firewall. There is a small plastic guide for the harness that mounts to the inner firewall that uses 2 screws. I know where it screws in but....
Does this plastic guide along with the harness mount under or over the rubberized jute firewall pad??

Thanks
Tim

forgot to mention... it's a 1970 Chevelle

under