Is this hole in the firewall stock?

[davepl]

I'm trying to figure out if this hole (the one that looks like it has bubble gum stuffed into it, to the top right of the speedo cable hole) is original. The truck is at the bodyshop and they're ready to start welding up this type of thing, but this is one we can't figure out.

If the hole was there from the factory, I'll just grommet it. But if its something the original owner drilled, I want to weld it up. But its my only truck so I have nothing to compare it to!

Second pic is current state, first pic is how it was when I bought it.

Thanks,
Dave