Originally Posted by
Dirtdrop
The tab catches the stop on the dropout, so it goes toward the bike. The little protrusions on the back of the washers go into the notches on the derailer.
I just realized that I bought a nice derailer with no mounting bolt or washers.
I'm screwed! Anybody got a broken one to sell me? I might be able to fabricate the parts, but I don't know.
See if your LBS has an old parts bin you can dig through. The mounting hardware wasn't Duopar-specific; mounting bolts from Success or Challenger models will also work.