Check out #15 in this link: http://www.cleancomputes.com/Cub/Super%20A%20-%20Super%20AV/TC-39B%20Parts%20Catalog/Page%20163.jpg
THE connection is made with 4 tapered bolts which connect through rubber washers, sort of like a universal joint.
This shows 2 of the 4 bolts. When I reassembled it I had new rubber washers made.
Here it is reinstalled with new washers.
This was done to change the leaking front transmission seal, so while you have it apart to repair the joint, I would recommend changing that seal...it is rather easy once you already have it this far apart.
Actually, I just found the original post for the whole procedure, in case you go this route:http://www.farmallcub.com/phpBB2/viewtopic.php?f=13&t=65406