I think that just helped guide it and stabilize it when in the docking stations on either end. There were only two cars. Mount Snow was searching for them a few years ago. I never heard if they were ever found.
See the two boards on the floor in this photo. Looks like the loop went between those boards for stabilizing during loading and unloading.
http://www.chairlift.org/pics/mtsnow/ms78.jpg