69 Barr Outer Trim to Grille clips, threaded nuts?

From what I remember from my 69 they where little plastic studs that get melted down like a rivet then the other chrome piece is put on and when I rebuilt my grills and replace the outer chrome piece I just used JB weld and some clamps to put it back together. and with the chrome piece back on the car and tight it held everything together. I hope this helps it has 35 years since I did my grills