[6pack] Late 72 Front Apron Question

[Bob]

Hi,

I am fixing some rust on the front apron, actually the upper part where the 
grill attaches.

I noticed 3 separate 1.5 & .75 inch pieces of sheet metal just welded on the 
top of the apron on the shelf just below where the grill attaches. One in the 
center and the others on either side. At this point they are just rusty and 
seem out of place. What is the purpose of these three rectangles? Can I just 
grind them off smooth?

Thanks,

Bob