MG Gloster Manual page 44

Seat Belts for 2 Seats in Third Row
The seat belts for 2 seats in third row are fastened and released
Seat Belts for 2 Outboard Seats in Third Row
The seat belts for 2 outboard seats in third row (with 3 seats) are
36
BEFORE YOU DRIVE
Ceiling Seat Belt for Middle Seat in Third Row
(With 3 Seats)
Fastening
Pull out the seat belt from the ceiling, have the fixed locking tab (2)
pushed into the left buckle, and have the movable locking tab (1) passed
over the abdomen and pushed into the right buckle.
Seat Belt Comfort Guide Ring
The seat belt comfort guide ring is fitted on the shoulder belt, which can
take the shoulder belt away from the head of the left occupant.
Take the guide ring out of the seat back storage bag.