Opel 2015 Mokka Owner's Manual page 162

160 Driving and operating
Open the protective flap and turn the
key to position c to unlock the
coupling ball bar.
Pull out rotary handle and turn
clockwise as far as it will go. Pull out
coupling ball bar downwards.
Insert sealing plug in opening. Fold
away socket.
Attach the cover and insert both
locking pins.