Britax Safe-nSound Instructions For Installation And Use Manual page 20

HOW TO INSTALL
H. Replace the centre panel flap, ensure
the harness buckle is through the
panel, and connect the hook and loop
to retain the cover. Then place back the
headrest cover end along the headrest.
For smaller babies replace the insert
pad (if fitted). Do not use insert pad if
the child's shoulders reach the lower
shoulder height marker. See page 13
for advice on positioning the shoulder
straps.
NOTE: Seatbelt extenders should not be used
if the seatbelt is not long enough to secure the
child restraint. If they are used then the buckle
must not enter the seating zone.
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