The main thing to know about the Autobellows is that the front cable release stops down the lens, and the one that attaches to the camera fires the shutter, so you need to set the front one to stop down the lens first. Alternately, use two cable releases and close the lens first before triggering the shutter.
There is also a way of reversing the front standard, as I recall, to reverse mount a lens, but I didn't have much reason to do this when I had an Autobellows, because I had a few dedicated macro lenses. If you do decide to try this, I tested all the FD 50/1.8, 1.4, and 1.2L lenses in reverse position once and the best one to use that was was the cheapest--the 50/1.8.