I am putting a fuel pump cut off switch in tomorrow and i know the wire to cut and i have the switch. My only concern is that the switch has 3 prongs and when i cut the wire, ill have 2 pieces to attach. The switch will light up when its on. the three prongs are labeled:
1. power
2. load
3. ground

which two do i hook the wire up to and what wud the ground do?

Thanks!!