Ducati MULTISTRADA 1260S Owner's Manual page 294

Refitting the seats
4
Position rider seat (4) front end, with slots (7), into
8
guides (5, Fig. 242) and engage pin (6, Fig. 242) into
its housing (8).
Make sure that pin (6, Fig. 242) is engaged in its
7
housing (8).
Make sure the passenger seat is properly fastened by
moderately pulling it up.
Take key out of the lock(1, Fig. 239).
Fig. 243
293