Trying to ID part for my sweeper

[Kubota BX 1860]

I recently bought a used BX2537A sweeper. It didn't have any instructions, but I managed to get it on anyway and it works very well. It has the adjustable dolly wheels and hydraulic angle. However, included were a couple of parts that I can't identify. Anyone have any ideas?

http://s37.photobucket.com/user/teebud/media/DSCN2174_zpswo8o8c6z.jpg.html?sort=6&o=0

 

[North Idaho Wolfman]

They are limit stops, one is strait the other is an undercut.

If you get the OPS manual it will tell them how to use them.