Graco Contender Slim Instruction Manual page 58

8. Tighten the Vehicle Seat Belt
Press down firmly in the center of the car seat. Pull
on the shoulder belt to tighten while feeding the slack
back in the retractor.
9. Attach Tether Strap
Extend the tether strap pressing
the grey button and pulling out
on the strap and attach to the
tether anchor point.
Consult vehicle owner's manual for specific location.
10. Tighten the Tether Strap
Remove all the slack. Tether strap should lie flat and
not be twisted.
56