^^^
Thats what it looks like to me. Well, now that I've taken a second look at it, the hole is a bit too small for a top link pin that comes on these tractors. Though the head is right. Are you missing a top link pin??
I bet that's the pin that hold the drawbar in the tractor. Sodamo, you're correct, it appears to be a bit long, but I bet thats where it goes. Check you drawbar.