Britax safe-n-sound BS0072E-i20133 Instructions For Installation & Use page 36

D. Press and hold the ISOFLEX adjuster release
button and pull the connector strap to fully
lengthen. Repeat for both connector straps.
E. Place the restraint in the desired location on
the vehicle seat between the two ISOFIX low
anchorages with the child seat against the vehicle
seat back as shown.
F. The stabilising bar need not be in contact with
the vehicle seat back but must be in position and
latched. Engage the ISOFLEX connectors onto
each ISOFIX lower anchorage. A green indicator
will show on the top of the ISOFLEX connector
when it has engaged. Pull each strap to ensure
both lower anchorage connectors are engaged. Pull
the adjusting strap to remove most of the slack on
each side.
36
Instructions for Installation & Use
Pull to check
connection
Remove
slack