As someone who has chipped some glass before, what I do is put clip through the metal holder, let it rest on outside metal ridge, then put clip fully on the glass, should be moderately tight, then with help of a strong individual and a small screwdriver (using the round part, not the tip) have your helper squeeze the glass and metal frame together and using the screwdriver pull the clip from the outside metal ridge to the inside metal ridge, tough but can be done and using your finger push on clip as you pull small screwdriver out and should seat on inside ridge. Do opposite sides and up and down otherwise the glass will get off on one side and you will never get other side to latch. Sorry I will post some pix in next couple of days.
Bob