I'm sure someone has probably figured this out. But I wanted to post my results and pictures too. Obviously whoever in China designed the top hook for the harbor freight quick hitch has never seen a 3 point implement before. It's too short, so it ends up carrying weight that should be on the lift arms. And it's too close to the frame so half the implements don't fit. Dumb dumb dumb. For example, my heavy Hitch only fit if you beat it on with a hammer. And my pine rake didn't fit at all.
I am happy to report this $30ish replacement hook solves both of those problems. The vertical alignment is actually correct, so it has hook contact but the weight is on the lift arms. And it sticks out enough to not jam up on the bolts. Basically it's everything through quick hitch should have had in the first place.
At around $30 with shipping, it still makes the $80 Harbor Freight quick hitch a great bargain. I'm usually all for buying American even if it costs a little more. But the iMatch cost for what it actually is, is just outrageous IMO.
This hook has part #141137 on a sticker. This can be found at numerous retailers.