Unwrap the insulating 'tinfoil'. Be careful not to rip, as I am not sure if this is really an insulator or not (IT is simply another protective layer). I used it again to re-wrap the cable at the end.
Inside there are 3 insulated cables (red, green, white) and three uninsulated cables. I assumed that the uninsulated cables could be twisted together (This assumption turned out to be correct), because if there was a concern that they couldn't touch, they'd be insulated too....