Britax Safe'n'Sound Instructions For Installation & Use page 24

INSTALLING THE BASE
C. Engage the seat belt tongue to
the buckle. Push downwards and
rearward on the restraint base to
compress it into the vehicle seat.
Whilst compressed in the seat, pull
on the lap belt to remove slack.
D. If a lap-sash seat belt is used then
allow the excess sash belt to feed
back in to the retractor.
If the seat belt will not stay tight in every day use, then fit a
gated 3-bar slide (not supplied with seat) to the lap-sash belt
to prevent loosening. See pages 54 and 55. Ensure the 3-bar
slide is removed when the Baby Capsule base is not installed
to allow other uses to use the seatbelt as a lap-sash seatbelt.
E. Locate the child restraint upper anchorage
fitting in the vehicle that is directly behind
the rear seat location chosen. Refer to
the car owner's manual for the location (If
there is no upper anchorage fitting then
refer to pages 49 to 53 for instructions in
adding an anchor fitting).
F. Connect the top tether strap attachment
clip to the anchor fitting in the car as
detailed on page 25. Install top tether strap
to the Baby Capsule as shown on page 25.
24
Instructions for Installation & Use
Belt Guide Hooks
Pull Sash portion
of seatbelt to
remove slack
Car's Upper
Top tether strap
Attachment Clip
Anchorage
Fitting