[CaifanSC]

I think I see the clip you are referring to. It's in the middle of the trim piece (I circled it in red in one of the attached pix). Mine seems to have that clip broken. There's definitely some sort of adhesive, so you are right. Someone probably tried to repair it at some point.

I may just try some strong cement-style adhesive and see if it holds. Otherwise, it looks like I'll have to source another piece.