Ducati MULTISTRADA 1200S Owner's Manual page 308

Refitting the seats
4
Position rider seat (4) front end, with slots (7), into
8
guides (5, Fig. 207) and engage pin (6, Fig. 207) into
its housing (8).
Make sure that pin (6, Fig. 207) is engaged in its
housing (8).
7
Make sure the passenger seat is properly fastened
by moderately pulling it up.
Take key out of the lock(1, Fig. 204).
Fig. 208
307