I used this in our above ground pool to start the pump. I feel more confident using the pool after installing this. A little difficult to open the first time. Additionally, there are black connectors at each end of the cable. When I opened the case, each connector was only on one side. It is split in half so I took 1 half and put it on the other side so all 4 pieces are on the 4 ends (not 2 pieces on 2 sides). It's hard to explain and I don't know if you should or not because the instructions don't say if the connectors should stay together or not. But I don't know how you would insert the cables if you didn't. I've only had it for 2 weeks so I don't know how long it will last.