Britax Steelcraft Zapo Manual page 25

STROLLER OPERATION
USING THE HARNESS
G The stroller seat has 3 sets of harness slots at different heights to
accommodate the child. The shoulder straps must be positioned near
the child's shoulders. To change the shoulder harness height, push the
shoulder harness tongue out of the current harness slot and through
the back of the seat and then pull the shoulder harness buckle tongue
through the desired slot.
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