Britax safe-n-sound BS0072E-i20133 Instructions For Installation & Use page 40

If the car's child restraint anchor fitting is behind the vehicle seat back you may need to use an extension
strap as part of the top tether installation.
IMPORTANT: If using an Extension Strap, positioning the attachment clip above the child may lead to
injury in an accident therefore make sure that the attachment clip is not positioned in front of the vehicle
seat. Use a shorter extension strap or no extension strap.
It is normal to have some sideways movement of the restraint if the headrest is pushed sideways. A
firmer fit can be achieved by applying more force to the ISOFLEX adjuster strap. If the tether strap is over
tightened, the installation angle of the restraint may be affected.
IMPORTANT :
The Top tether strap must be fitted at all times when the baby is in the car when using either the
seatbelt or the ISOFLEX connectors.
Always secure the loose end of the top tether strap to prevent it hanging out of the car or being
accessible by the child.
THIS RESTRAINT IS NOT SUITABLE FOR USE WHERE THE TOP TETHER STRAP MAY FALL
INTO A SPLIT IN THE SEAT BACK OR OFF THE SIDE OF THE SEAT.
ALWAYS ATTACH TOP TETHER HOOK AND REMOVE SLACK IN THE TOP TETHER STRAP.
40
Instructions for Installation & Use
Attachment Clip
should not be
in front of the
vehicle seat
Attachment Clip
Attachment Clip
should be behind
the front of the
vehicle seat
Extension Strap