I went over some railroad tracks and this piece fell down and hit my leg on the driver side. I have a 2017 Ford Edge SEL Limited. I don't notice anything wrong, or any difference, but it's driving me crazy. I can't seem to find a part diagram to locate it. There is no identifying numbers on it, and I don't know the proper nomenclature to find it. It obviously looks like a roller with a tensioning coil on it. I looked up under the dash and can't see any gaping hole or missing piece. Can someone please help me before I go mad? I just want to put it back.