There are 2 cables internal to VAXMIDI. One connects the Pitch/Mod Wheel to the Controls circuit board. IT is a 4 pin picoflex cable from Molex. The other is an 8 pin picoflex cable that connects the Controls board to the Main circuit board. While both cable are included in the VAXMIDI package, cables are always the first thing to fail and you may someday need replacements. These cables are available from Mouser Inc.
There are 2 connectors that connect the Sensor boards to each other and to the Main circuit board. For each board connection you need one 6 pin and one 4 pin AVX B2B connector. They too are available from Mouser