Ok I see. Now go round to your nearest digger or tractor dealer and buy a cut off switch. One with the plastic butterfly key would be best, oh yeah and buy 2 or 3 keys, because they have a habit of going missing. Put it on the earth cable. You'll find that easier than playing around with the power side. Make sure you can open her with the key, because when you cut the power off you wont be able to zap her.... You'll also need two cable ends, the crimp fit ones with a hole to mate up with the threads on the switch.. Mightn't be a bad idea to get an extra bit of cable too, You're going to have to find somewhere to blot the switch on and will most likely need a longer cable...