Vauxhall Agila Owner's Manual page 31

3-4 Seats, restraints and interior
Unlatch detachable connector on
centre rear seat belt by inserting the
ignition key in the slot on the
connector and allow the belt to
retract.
Insert latch plate into the slit on the
belt webbing and insert detached
connector latch plate in roof holder
slot to the rear of the belt webbing.
To fold outboard rear seatbacks
separately 3, pull seatback release
lever downwards, fold seatback
forwards and down onto seat
cushion.