Chevrolet 1993 Astro Passenger Owner's Manual page 22

Seats and Safety Belts
To install
the
seat:
a
1.
2.
3.
Lower the seat into position. Make sure the front retainers are hooked
onto the anchor pins. Do the same for the rear retainers. Make sure the
seat is locked in by pulling up and down on the seat.
Raise the seatback by pushing forward on the latch at the right rear of
the seat. Pull up on the seatback until it is locked securely in the up
position.
Attach the quick release latch plate to the buckles in the roof. If you are
installing the center seat, connect the right lap-shoulder belt to the
attachment on the seat cushion. If you have a safety belt guide on your
seat, pull the belt through the guide before reattaching the lap-shoulder
belt to the side of the seat. The release hole should be facing outward.
If you installed the safety belt with the release hole facing inward
(toward the seat), slide the plastic cover up so you can see the buckle.
Disconnect the seat belt. Slide the cover back down and reinstall the
belt correctly.
A
To avoid personal injury, do not ride in the right position of the
center seat unless the safety belt is securely anchored. Be sure the
buckle on the free end of the belt is fastened securely to the latch
plate mounted at the base of the seat.
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