Neer window help..rollers and such

Hey guys 1973 dart swinger
I took these windows out so long ago cant remember how they attach..most of the rollers work.i am replacing a couple of broke ones..
Question is how do i actually mount the windows to the track.? I see they are threaded
What fasteners to use..i might have lost originals
Pics.with circles if questions
Also what do you call those clips on the last pic

Thanks Fabo