First of all to say that the transformer including Header has been performing flawlessly. I have currently eight lights in operation.
The cable is somewhat unruly, despite its length of 1.5 meters. May not be seen in the image completely, the cable with the connector strip is firmly attached and can be in the transformer on and unplugged at the other end. The Header was in my case, however, not like the picture in the 1x10 format, but in two rows, each with 5 connectors. However, it can still be fixed as usual with several screws easily about on a wooden plate.