Britax Safe-n-sound BS8100A-020133 Series Instructions For Installation & Use page 52

HOWTOINSTALLCHILDHARNESS
FITTINGTHEGATEDSLIDETOTHELAP-SASHSEATBELT
A. Hold the lap and sash straps together and fold as shown.
Slide the inner strap into the Gated Slide followed by the
outer strap.
IMPORTANT:

Face the hollow side of the Gated Slide and the inner
strap towards the child. Do not use Gated Slide for any
other purpose.
B. The two straps should slide freely in the Gated Slide slot.
C. Repeat previous step A for the other slot in the Gated
Slide.
52
Instructions for Installation & Use - Series No. BS8100A-020133
Outer
Inner
Strap
Strap
Ensure the lap portion of the seatbelt
is nearest to the child
Faces
towards
Child
A
B
C