If it is the way I think it is, before the change up (04/05), you can get a screwdriver in the latch assembly and release it, then repair the seat.
Get in from the rear and you should see the latch for the seat about 8" down against the wheel hump in the same line as the rear shoulder belt.
Get in from the rear and you should see the latch for the seat about 8" down against the wheel hump in the same line as the rear shoulder belt.