Ducati Multistrada 1200 ABS Owner's Manual page 122

Refitting
7
E
Position the front part of the rider seat (4), with slots (7, fig.
108), in the pins (6, fig. 107) of the tank.
Push on the front end of the rider seat to move the pins (6)
to the bottom of the slots (7).
Insert the rear part of the rider seat into the pins (5, fig. 106)
of the frame.
Insert the rear hook (3, fig. 105) into the opening in the tail
guard and lower the front part of the passenger seat (2) until
you hear the pin click in the latch.
Make sure that the passenger seat is properly secured by
gently pulling it upwards.
Remove key from the lock (1, fig. 104).
fig. 108
121