4. Before inserting the head into the pole, align the communication
line with the arrow to the card slot for installation.
5. Insert and install the head into the pole.
6. Use the M3 Allen key, twist the screws slightly in order
of the below picture. Tighten the screws thoroughly
7. Use the M5 Allen key of the tool bag to install
the brake handle to a comfortable angle (as
shown in the picture).