QUOTE(clarkma5 @ Sep 7 2005, 01:59 PM)
It's the seatbelt for the center rear seat. When you fold the seat up you route the belt through a thingamajig next to the headrest and then anchor one end. When you fold the seat down (or just don't care to have the seatbelt in place) it stows up there.
Gotcha. Thanks.