How do I use the belt positioning clip with the backless booster?

To use the belt positioning clip: (1) Ensure vehicle shoulder belt is in the red zone shown in manual, (2) Attach clip to slot on bottom of base by inserting loop end of strap, (3) Pass clip and strap through the loop and pull strap up, (4) Free end should face front of seat, (5) Place child in seat and buckle in, then slide clip onto vehicle shoulder belt, (6) Adjust clip length so it fits at top of child's shoulder. The lap belt must still lie low across hips. (Page 67-69)