Ducati Monster 796 Workshop Manual page 490

Exhaust system
Release the end fitting (A) of the cable (36) from the exhaust valve (B) and remove the circlip (45).
Remove the cable (36) from the exhaust valve (B).
Remove the clamps (39), (40) and disconnect the exhaust valve motor wiring (C).
Unscrew the bolts (15) and remove the exhaust valve motor (37) from the rear number plate holder.
Remove the clip (46) and the cable (36) from the exhaust valve motor (37), sliding off the end fitting (D) from its seat.