Ford Mustang Owner's Manual page 110

Rear Seat Entry
Coupe models
Entering the rear seat (coupe)
The rotating boot on the lap belt is designed to
allow rear seat entry/exit. To enter the rear seat:
1. Remove seat belt from seat belt guide on top
of front seat.
2. Rotate the safety belt boot rearward.
3. Enter the rear seat in front of the safety belt.
4. Rotate the safety belt boot forward and place
the belt in the belt guide on the seat back to
allow use by the front seat passengers.
109