Opel 2015 Astra Owner's Manual page 72

70 Storage
If the bicycle has curved pedal
cranks, screw in the pedal crank unit
all the way (position 1).
Put on the bicycle. The pedal crank
here must be placed in the pedal
crank recess opening, as shown in
the illustration.
Caution
Make sure that the pedal does not
touch the surface of the rear end
carrier. Otherwise the crankset
might be damaged during the
transport.
Insert pedal crank mount into outer
rail of each pedal crank recess from
above and slide downwards until at
least underneath the notching.
Attach the pedal crank by rotating the
attachment screw on the pedal crank
mount.