Mystery Holes in my firewall?

So I'm getting things put back together and my son asks what are the two holes for? I look and I don't recall anything being there. One has a grommet that looks like something was rubbing on it and the other may have been cut in at some point as the edges are rough.
It's a 73 Barracuda originally a 318 with auto trans and the fender tag also indicates auto trans. Any thoughts?


firewall.jpg
Author: toomanycars