Da fällt mir ein, genau so ein Clip hab ich auch noch rumliegen und weiß nicht mehr wohin ,jetzt schon

Hab schon überall gesucht aber finde keine zu kaufen..
Looking at you photos it looks like your car has the vinyl back glass. If that is how it was originally equipped it would have not used the hard board divider. The screws that held it at the bottom were a phosphate washer head self tapping screw. At the top several clips were used to hold it to the structure. Your Marti report should list the deluxe back glass if your car had the option. If you do not have a Marti report check under the body for evidence of the bottom mounting holes. I'll try to find a picture of the clip.