1975 Dodge Dart Sport vinal top trim help!!!

You should be able to put the clips on the studs and then snap the chrome on. I kind of hook the chrome on one side of the clip then bump it with my hand to snap it over the other side. I'm not sure you have the right clips. Your pic looks like the clips just hold on one end (the right side in the pic with the clips in the chrome.). I believe mine were made the same on both ends (with the slot for the stud in the middle) so they would hold better.
Dallas