[WizenedEE]

While it may or may not be legal, I would not do it either way. Whenever you put a bunch of wires into a big cable, you have problems identifying which one is which. If two PWM cables somehow come out (common in spikes), you don't want someone plugging them in backwards and then deploy when you try to open your claw.

It's best to have each wire be routed along its own path. That makes you absolutely sure that it's the right wire without looking at colors or reading tags, and looks really nice. However, if your relays and things are a ways away from your Digital Side Car, you should probably just go for it, since it's so near the end of the build season.

See if you can't obtain some "real" PWM cables though.