my puppy decided to do a little chewing on my portable charge cord. the little bugger chewed up the AC supply cord, close to the plug. i wanted to cut off the damaged section and replace the plug. I cut the damaged end off to find that not only are there the three expected conductors, line (black), neutral (white), ground (green), but there are two other wires, orange and red. I had thought all the signal wires were between the car and the charger, but it looks like there are some between the power source and the charger as well. Does anyone know what to do with the red and orange wires at the plug end?