Mazda Tribute Owner's Manual page 140

Seating and Safety Restraints
Perform the following steps when installing the child seat with
combination lap/shoulder belts:
Note: Although the child seat illustrated is a forward facing child seat,
the steps are the same for installing a rear facing child seat.
1. Position the child safety seat in
a seat with a combination lap
and shoulder belt.
2. Pull down on the shoulder belt
and then grasp the shoulder
belt and lap belt together.
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