Hmm, maybe just use some variation of DIN connector? It’s a circle, but keyed to one position, and fairly effortless to plug in the right way without seeing. Also full size DIN connectors are robust as hell and can be easily replaced and rewired.
Hell, my Commodore 64 IEC bus cables still work after decades, and I can’t say the same about many USB cables these days.
Hmm, maybe just use some variation of DIN connector? It’s a circle, but keyed to one position, and fairly effortless to plug in the right way without seeing. Also full size DIN connectors are robust as hell and can be easily replaced and rewired.
Hell, my Commodore 64 IEC bus cables still work after decades, and I can’t say the same about many USB cables these days.