If you want to use a different pump head on the RENNKOMPRESSOR, such as CLIK TEC or MV EASY, the hose must be cut directly at the pre-mounted Presta brass connector. The desired pump head can then be fitted to the hose.
From minute 5:44 in the video, you will find instructions showing, for example, how to replace a pump head with the CLIK TEC valve head.