Rear Vinyl Trim Removal

Here's a couple shots of my 72 Scamp at teardown,
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I had holes for the screw in type clips, the one on the far right (around the corner of the trim) had a small spring type arm that engaged one lip of the trim and the pointy end of the clip body hooked into the other lip.

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Then I had these clips over the posts that are welded/part of the body sheetmetal. I couldn't find these for the life of me at the time, being so narrow. My step son tried 3-d printing one for me, but the material was too brittle and snapped when I tried to mount it on the stud.

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This shot shows the screws mentioned by str12-240 in post #6. So whether it's factory or not, I basically had any kind of retainer you could imagine inder that trim.