Inserting the drive unit into the Plunge Base (see figure A)

Open the clamping lever (10) if it is closed.
Bring the two double arrows on the drive unit and the plunge base (2) into alignment.
Push the drive unit into the plunge base as far as it will go and turn the drive unit clockwise as far as possible.
Lock the clamping lever.

After assembly, always check that the drive unit is secure in the plunge base.