Solution:
The end of the hexagonal rod of the extension corresponds to the hexagonal hole in the ratchet spindle and with a little force the hexagonal rod with ball can be pressed into the hexagonal hole of the ratchet.
The end of the hexagonal rod of the extension corresponds to the hexagonal hole in the ratchet spindle and with a little force the hexagonal rod with ball can be pressed into the hexagonal hole of the ratchet.