A friend just picked up a used Buyer Spreader. The controller has the black wire(ground) a blue one and 2 reddish wires (all cut off close to the box). The blue one would go to a fused accessory right? I know at least one of the reds has to go to the battery & one to the spreader. Does it matter which is which? One seems to be more of an orange if that helps. Thanks.