Toyota Prius c 2014 Owner's Manual page 146

1-8. Safety information
Forward facing  Convertible seat
■
Rear center seat: Adjust the head restraint to the upmost
STEP 1
position. (
STEP 2
STEP 3
STEP 4
144
→ P. 81)
Place the child restraint system
on the seat facing the front of the
vehicle.
Run the seat belt through the
child restraint system and insert
the plate into the buckle. Make
sure that the belt is not twisted.
Fully extend the shoulder belt
and allow it to retract to put it in
lock mode. In lock mode, the belt
cannot be extended.