Britax UNITY Instructions For Installation And Use Manual page 31

D. Ensure the upper anchorage strap attachment clip
have been fitted to the car's anchor fitting. If not
already connected, refer to page 25.
E. Feed the Upper Infant Carrier strap on the inside
of the handle and through the locating slots in
the front of the Infant Carrier.
F. Adjust the Upper Anchorage Strap by pulling as
shown below to remove any slack in the straps.
Do not over tighten.
Press button to
lengthen
IMPORTANT :
The Upper anchorage strap must be fitted at all times when the baby is in the car.
Pull to
remove slack
Adjuster
HOW TO USE
Locating Slots
Upper anchorage strap
Upper Anchorage Strap.
31