Hi Rob,
The second picture is the correct picture for a Gran Coupe painted tail panel my friend. You should have three holes on each rear quarter for the trim piece to fit on to, the paint line is masked half way under the trim parts themselves. The textured argent also is painted as low as where the rear bumper bolts on as well buddy. Does that help with your questions or do you think you may need some picture examples, i could have a dig around and see if i have something for reference for you.
Kenny.