Chevrolet 2013 Traverse Owner's Manual page 104

3-50 Seats and Restraints
2.2. Route, attach, and tighten
the top tether according to
your child restraint
instructions and the
following instructions:
If the position you are using
does not have a headrest
or head restraint and you
are using a single tether,
route the tether over the
seatback.
If the position you are using
does not have a headrest
or head restraint and you
are using a dual tether,
route the tether over the
seatback.