FISCHER Profi Plus III Gebrauchsanweisung Seite 11

Operating and safety precautions
GB
Pull forwards the safety catch on the ball-head
element and attach the ball coupling. Tighten the
securing screw in order to hold the coupling in place.
This will prevent the ball-head coupling and tow bar
becoming separated during use. [Part-Nr. 12]
Place the safety strap around the bicycle's saddle
post and hook it to the bracket on the tow bar.
The connection between the bicycle and the trailer is
an important part of the assembly process. Make sure
that the trailer is securely connected to the bicycle.
Step 11:
Connect the trailer to the
bicycle
IMPORTANT!
Fully-assembled
trailer