Savaria Toyota Sienna Owner's Manual page 18

4. Attach the shoulder belt anchor pin to the D-ring connection at the
rear roofline of the vehicle.
5. Pass the free end of the shoulder belt over the passenger's left
shoulder. Connect the belts together using the D-ring end of the
shoulder belt and the anchor pin on the lap belt. Clip the lap belt
assembly to the belt buckle at the passenger's right hip. Remove
slack from the belts and ensure the occupant is comfortable.
When the occupant restraints are not in use, the spare tire cover pocket
and/or the rear storage bin provides a convenient storage area.
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