TVS Jupiter BS-VI Owner's Manual page 28

4. 'Seat unlock' position
Seat lock is inbuilt in 'all in one lock' of TVS Jupiter
ZX. To open the seat, keep the key in 'OFF' position
and turn it to anticlockwise direction without pushing
the key 'IN'.
To lock the seat again, press the seat at the rear end
to its position. Ensure the locking of seat by hearing
'Click' sound.
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5. 'Fuel tank cap unlock' position
Fuel tank cap lock is inbuilt in 'all in one lock' of TVS
Jupiter ZX. To open the fuel tank cap, keep the key
in 'OFF' position, push the key 'IN' and turn it to
clockwise direction. The tank cap opens automatically.
To close the fuel tank cap, press the cap at the front
end to its position until a 'Click' sound is heard.