I took a group of new shots, and also noted in my returned TopsonLine manual that the release button wire flows up the tonneau hinge and resides along side the manual release. The solenoid in my car has a wire that runs down and out under the rear seat carpet. I'm not inclined to peel it back to trace it though.
There has always been an unusual harness pair in the lift up center stow section. I got close up shots of that and the RDS radio fitting problems, more in my case as the wiring was poorly redone when I got the car
Bill

 

There is no button, where I pointed out in the above mention, for mine, but will look things over for the harness.
My trunk now sits over the closed tonneau again though. Several other pics show the weatherstripping residue that is left after the year or more the top was in closed position. I cleaned with water only so any suggestions for trying further, I welcome. I bought WD40 on the advice it has been known to loosen grime like stickers, and I've been not too impressed in that regard. I do want something that is kind on the paint
As far as the radio, the pics demonstrate, more the problems in the larger chassis over past GM radios, I don't know how the Camaro slot is configured, but the clamps mounted to my past Delco slid over the molded posts (can't recall if it was screwed in on the sides. Delco now molds metal flanges on some of the units
BILL

 

This may not be something that can be fully realized, and may be a theft potential as well, but being as these model Delco incorporate 6 disc changers (one option I think accounts for the larger size) and cassette/CD in one head unit.
-B