Rory , also try the 4 x 4 fitment centres ,and see i they dont have an alternate means of cutting out the power to the winch live cable when not in use , in aviation we use circuit breakers with various amp ratings like 1, 2 , 5 and so on right up to 120 amps which protects a circuit in case of an over load ,its spring loaded and can be manually pulled which makes the cicuit dead until pushed back in and then will automatically pop out if the amperage rating is exceeded ... only problem is they pricey and work on 24 volts not 12 , i'll get u a pic and see if i can find a 12 volt type, just need to know how many amps the winch draws when running.