Buick ENCLAVE - 2009 Owner's Manual page 43

2.3. 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.
Seats and Restraint System
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.
1-39
If the position you are using
has a fixed headrest or head
restraint and you are using a
dual tether, route the tether
around the headrest or head
restraint.