MSW Motor Technics MSW-DCM-02 Manuel D'utilisation page 18

Mounting the tip:
Slide the helix connector into the piece connector.
Note: Watch for the flexible shaft pin through the hole of the tip. A secure connection is only made
when the pin is on the outside.
Disconnecting the helix:
Insert the wrench and press the helix with both hands in the opposite direction from the connection slot.
Pipe cleaning