Those are actually smart cables, which glow one line for each channel in use. They're a bit expensive, but you can use a single smart cable of the proper color where they join the main line and then save resources because it'll still read how many channels are in use. And I believe they'll connect only to the same color regardless of the cable type.
Yeah, looping is a big pain in the neck.
Yeah, looping is a big pain in the neck.