I have been asked to give more details about the DCB connector in my Jupiter-8, which was written about in my last post here: http://artoftravelogue.blogspot.com/2015/03/roland-msq-700-sequencer.html
The above photo shows the typical style of DCB connectors that are found on the Roland Juno-60, later versions of the Roland Jupiter-8, the MSQ-700, OP-8, MD-8, etc, etc. The photo below shows that style of DCB that my version of the Jupiter-8 has.
I cannot find my notes on the pinout for this homemade cable, as it has been more than 17 years and 3 moves (one across the country) since I made it. The following link, however, shows the pinout for both versions of the cable.