Rivets in the way of hitch
So I went to put on a Reese class III hitch on the xj, and first found it was a pita cause the bolts holding the stock skid were rusty and took atleast half an hr each to take off. But I noticed in the second hole in from the back there is what looks like a rivet. I need this hole but I'm not sure what the rivets for. Any ideas of what it goes to and if there's still a welded nut in there?