It is a super easy install. First, get the one with the 2 fans. Then, there is a clip on the fan that clips onto the fins in the back of the refrigerator to hold it in place and act as a ground. Then there is a wire on the fan that you run to the light inside the refrigerator. You remove the cover from the light and attach the wire to the side of the light that always has power. You can test to make sure that you have the right connection by manually turning the light off and see if the fan continues to run.
As I said, very easy install and makes a big difference in the temp in the refrigerator.
Tom and Margaret
2014 Berkshire 390bh-60