Mazda 2002 B2300 Owner's Manual page 143

Center seating location 60/40 seats with folding armrest
When installing a child safety seat in the center position, route the tether
strap over the center arm rest and clip it to the center anchor.
See next page for center seating location of vinyl 60/40 seat.
WARNING: If the tether strap is clipped incorrectly, the child
safety seat may not be retained properly in the event of a
collision.
Seating and Safety Restraints
143