I noticed that there's a wire disconnected behind my 2015 Promaster. It was confusing as to where it came from, so I looked at the other side and found that it was disconnected on that side as well. It has a yellow (or blue?) spring loaded snap connector, with some type of tape around the wire. I did not receive any warning signs inside the van. I am concerned as to what is disconnected. Can someone please let me know what they are for?