Ford 1998 Windstar Owner's Manual page 155

The two passenger bench seat must be installed in the first row
behind the front seats.
Never adjust the driver's seat or seatback when the
vehicle is moving.
Always latch the vehicle seat to the floor, whether the
seat is occupied or empty. If not latched, the seat may
cause injury during a sudden stop.
Before using the seat, make sure that the latch hooks are
securely locked around the floor pins.
Seating and Safety Restraints
RWARNING
RWARNING
RWARNING
155