Duster Grill Install Question

Hey FABO!

Car is a '70 Duster.

I'm having some trouble getting the grill in, specifically with the lower retaining tabs.

This is the piece I'm talking about, 5 pcs across the bottom of the grill...
upload_2022-2-24_0-45-33.png

I'm assuming that the circled cylinder pieces (above) are supposed to sit in the round cut outs in the lower grill support...
upload_2022-2-24_0-46-39.png

But, I'm measuring the cylinder tabs to be 1 1/4" across, and the cut out to be 1 1/8" across...
upload_2022-2-24_0-49-7.png

upload_2022-2-24_0-49-37.png

Am I wrong on this? I don't want to try and force it into the hole and damage it.

What am I missing?

Thank you for any replies.