Dometic Fridge in our Avalanche

I have looked in our fridge manual and online at the Dometic website, but cannot find anything that has to do with the question I have. Inside the refrigerator there is a plastic slide attached to a wire that you clip to the condenser(?) or whatever that metal thing is..ok im not mechanically inclined. But anyhow, what is it? It the arrow to be pointing to the center of the plastic clip? Or upper or lower? Does it have any purpose? Thanks for your help!