I somehow think the cable tying them to the exhaust idea was meant sarcastically...
There's no where inside to run themreally, apart from where they are, unless you drill a hole into the sills and run them through there, would be a massive PITA though, and there's probably a reason why no one else has done it.
Best bet is to just remove ones you don't need, rear speaker wires, rear wiper wire etc, and just tidy the rest up.