I have a 2006 2400 SE with the same back seat I think. There were these plastic "Z" clips that held the seat down. They've both broken so if anybody puts their weight on the front of the seat cushion, they'll soon be sitting on the engine hatch
.
Seriously, I"m thinking of having some new clips fabricated out of aluminum, but it's pretty low on my to-do list at the moment.
Cheers,
-Greg