I say clip mounts... I don't know what they are actually called but
they are the tabs along the bottom of the upper grill that catch
inside the upper radiator opening. They are often missing, I notice,
and the outer two were broken off of my 83 westy grill.

A couple of days ago I was going through my parts and noticed that
similar clips on the bottom grill would, if removed from that
easier-to-find part, epoxy right into the molded channel that was part
of the original piece before it broke off. If you are looking at the
upper and lower grill off the car, you will easily see what I mean. I
cut the donor pieces to shape with an exacto hobby saw and then glued
them into place. The whole operation took less than ten minutes and
works great, no doubt stronger than before.

I took pictures for those interested.

Jim