Looking at your pic, BigBird, the bracket would need to go roughly where that spotwelded bend over tab is. I'll have to look up a few more pics to see what that is, unless you are able to see a mounting locating where it once was.
I found a few more variations of the already posted diagrams. Also, one that showed the mounting bracket located off the diff cover bolt hole, but being in the 1972 Manual was likely a carry-over from the 12-bolt diff diagram, similar to the link Brian posted. You know that yours is likely the original rear and a 10-bolt?