Vinyl tip trim fasteners

I got a set from RT Specialties, but I am unclear how the side pieces attach. The fasteners he sent are too big for those holes, besides I don't think you can access those holes from behind to attach the speed nuts.

I believe the fasteners I got are for the trim that goes on the Dutchman panel, however there are two small holes on either side of the middle hole that are smaller also. Man I'm so confused.

Here are some pictures. 70 Dart.

You might need to enlarge the holes a bit, but they are accessed from inside car, I believe I accessed them from openings behind the headliner when I did this, might be possible from the trunk side, but you will a helper to install them. I believe the clips I used were all the same size, but my car did not have a vinyl top originally, I added it and had to mark and drill all the holes.

I can't go behind the headliner as it's already in. O believer I need little sheet metal screws with the plastic retaining clips for the sail panel pieces. I'm gonna check with rt Specialties today and see what he suggests.

Well I called RT Specialties and he said they don't reproduce them, so you have to get creative.

He thought you might be able to access those sail panel holes through the quarter via the rear door panel or the trunk.

Anyone else have this problem?