JD1, The vent itself has a pivot arm that hangs down. It is connected to a similar looking arm which points upward that is connected to the lower vent support brace/handle assembly. My rig is so cluttered under the dash, it would be hard to see the bracket assembly via a pic. Maybe that's why it drives so well
Here, I googled and found a decent pic of the assembly. The vent's slotted arm connect's to the lower assembly's slotted arm.