Metal bar (handle?) on the Super 9?

[Evets411]

Can someone give me some insight as to what the metal bar is that is comes out of the plastic under the seat on the back left? Almost looks like a handle or something. Is it there to use with a lock to secure it?

Thanks.

[speedy_scooter]

Its where a passenger can hold on. It also is where you can attach another helmet when your driving like on a sportbike.