Ford 1996 Aerostar Manual page 19

Proper stowage of shoulder safety belt
Disengaging rear seat safety belts for seat
removal
In order to remove the rear seat, the safety belt
must be disengaged from the seat. To disengage
the safety belt from the seat, insert a key or
small screwdriver into the slot provided on the
detachable anchor. Then lift upward.
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