What's the (installation) Trick?: Headlamp Bezel/Trim Ring

The '65 A Body headlamps have two fasteners across from one another on top, and a little ledge kind of a "catch" used to grab hold and secure the very bottom (see photo #3). Trying to re-install the bezel today, I finally gave up. I tried; A) to place it head-on and then push up slightly, did not work; B) to place it offset, pushing it in carefully, and giving it a very small rotation, did not work either. Thanks for any hints you have to offer (did a search on FABO, but came up with only wanted/sale info).

headlamp bezel catch 1.JPG

headlamp bezel catch 2JPG.JPG

headlamp bezel catch 3.JPG