how long are the fiber optic cables, that may be of help in finding out where this was.
the receptor fittings and insert gromets don't appear to be 1969 issue, I could be incorrect though.
The thru the wall grommets look correct, but why would they be there when camaros lights are inside the body, only the license plate would go thru the wall.
or possibly those gromets fit into the light assembly other than camaro, just a guess could be for a cady or impala, full size car.
camaro coupe cable lengths are about 60".
my guess is that those cables, with that head configuration, may be about 115"-120" which would mead full size vehicle.