What is this?

[parb]

Hi all,

i am having a bit of a brainfart. We're in the assembly phase of the repainted 72 jimmy and i just can't remember for the life of me what was mounted in the area highlighted in the picture. I went through my parts and i have either misplaced it or otherwise screwed up but i can't figure out what goes in this area.

Anyone recognize what is being mounted in this hole and advice me what it is (and if i have to purchase the part, where i may find it)?

Thanks!!!