Since the subforum is 'Jamma and pre-Jamma', maybe that's where we should draw the line? Otherwise you can add stuff like MaiMai, IIDX and all sorts of other junk to the list.
This said, it is standard 2.54mm pitch, so you don't have to use the official connector. Personally, I just quickfired a makeshift harness with Dupont connectors. You could use Dupont, JST RA, or even any 50-pin IDC ribbon cable and just hack off the end.
I'm not sure what the official connector is. I'm guessing it's JST RA, but I could be wrong.nem, how did you wire the Hoops harness? Do you know the AUX connector so I can make my own (or ask to be made)?
This said, it is standard 2.54mm pitch, so you don't have to use the official connector. Personally, I just quickfired a makeshift harness with Dupont connectors. You could use Dupont, JST RA, or even any 50-pin IDC ribbon cable and just hack off the end.