I believe that the bracket was replaced by something else. I just went through all these drawings myself and also came across the same confusion. I have a picture of all the parts you need to build a 2.X in this
http://www.buildlog.net/forum/viewtopic.php?f=20&t=2581 For Sale thread. Each part has a part number and the proper quantity shown. You can use that for a reference if you're cutting your own parts on a CNC Router. If I don't show it, then you don't need it.
The motor's are NEMA 17, 'dual shaft'.......
Bob T.