67 Fastback, mystery screws questions

The holes on the front of the rear shelf are for the chrome strip that holds down the carpet.

I would take a pic but I don't want anyone to see how dusty the inside of my car is getting.

Edit..... You can see it here.

http://www.tocmp.com/brochures/Plymouth/1968/Barracuda/1968PlymouthBarracudaBroch/68-06_JPG.html