Grommet in Grill

["Timothy H. Collins" <thcollin@mtu.edu>]

The Moss & other catalogs show a grommet associated with the grill fixture 
(1961 - 1980). The Moss part number is 472-735. Four are required.

Where is this installed? The diagrams show four bolts, 8 plain washers, 4 
lock washers and 4 nuts across the top and two bolts and washers on the 
bottom tabs of the grill. But. . . where do the grommets go? Do they serve 
some sort of anti-rattle function?
Thanks!

Tim Collins
Midland, MI
1966 AH Sprite