Either wire that goes to the kill switch doesn't matter. You must buy a tether that breaks the cuircut when you pull the tether off, NOT one like on other Yamys, Polaris or Doos where as when you pull the tether it completes the cuircut. Artic Cat uses the style you need and I used a genuine Artco one. My dealer used cheeper after market ones and they had 2 fail over the season. Pay now or pay later.