Question on re-installing headliner side/door trim

68' Dart hardtop. Trying to re-install the long curved trim pieces that go along the sides. I removed the weatherstrip and aluminum channel (forgot that this captured the trim piece).

There are clips/retainers that slide in the trim. Overall, pretty challenging to reinstall. There are tiny barbs on the clips but I am not sure how far it needs to be pushed past the barbs.

Big thing is that is has been 12 years, and I cannot remember how it came apart (and didn't take good pictures of this area).

Thanks!

Roof rail molding I believe it is called.

I'm good. Just takes some persuasion. Clips popped out a few times, but after the third or fourth attempt it is on.