Honda SH300A 2015 Owner's Manual page 50

Storage Equipment
Seat
SEAT
46
Ignition switch
Seat opener switch
Seat Open
!a Turn the handlebar pointed straight ahead.
!b Turn the ignition switch to the position of
SEAT and push the seat opener switch.
u To unlock the ignition switch
!c Open the seat.
Seat Close
Close and push down on the rear of the seat
until locks. Make sure that the seat is locked
securely to pull it up lightly.
Take care not to lock your keys in the
compartment under the seat.
(P37)