Q-to-U translations

Anyone on list familiar with the various Qbus/Unibus convertors that can help with this problem? Actually two, I'm trying to connect one Unibus expansion chassis to a Qbus host, PDP11/83. I've another Unibus chassis which I'd like to mate with a mVAX4100. I have the DEC M8217 and Able 10340 convertors but have not been able to find any documentation on either. Would either of these work or do I require a different product. I know Able made at least 4 of these variants. Able has not been very helpful in the past, general response going something like ...... we have a manual that may answer your question, its only $100.......... It just occured to me, I think the Able boards were meant to be plugged to the Qbus side, my situation requires a Unibus board, at least in the case of the 4100 project. Also, my 4100 manual completely glosses over its Qbus capability. Anyone know the p/n and or pinouts for the 4100 Qbus cable? Thanks in advance for any suggestions Nick