Last time I used can was for battery controllers on one tool family back in pipelining, people kept losing or forgetting the terminators.

There’s the nighthawk toolhead for Stealthburners that’s one of those usb umbilical boards, and did look at this printable tophat in the past.

I definitely ran spares in my cable chain as the less I need to open them the better, if I did discreet wiring on a new build though I very much might consider running something like a multi conductor cable through the cable chains with a smaller one for power+ground, build in some allowances for spares just to be safe.