UNIPRODO UNI TRAILER 16 Manual De Instrucciones página 20

3. To couple the tow beam to the bicycle, operate the hitch mechanism knob
counter-clockwise to place the hitch cap over the ball hitch. With the trailer
coupled to the bicycle, operate the hitch mechanism knob clockwise to secure
the ball hitch.
4. Lash the trailer to the bicycle with the safety strap around the seat tube.
Secure the safety strap end to the clasp on the tow beam.