Hmm..are there any black wire inside the contraption? What you could do would be cut the wire of choice and rough or sand or whatever the ends to crap and then tape it tighly together with electric/duct/whatever's available tape that looks similar. Many hardware stores have thin rolls of straight black inconspicuous electrical tape for not much $$. Only two things to make sure of, 1. Check like three times the wire has nothing to do with power supply because fires suck like nothing else, and 2. make sure there's a little bit of space between the cut and mangled ends. If he somehow figures out where the problem is and you're asked about it then it 'was probably something done by the shop or previous owner because there was something wrong with it and they didn't want to get a proper repair done'. It happens all the time, right?