Although there are many screws there - but unfortunately in my case (the thickest) not the right length: a too short (1cm), the other too long (3cm). So then "too long", the screw with each one of 1cm spacers used (according to the manual for rounded backs) and it fit, and the distance from the wall enough for mains plug, SAT and LAN.
Also ugly is that the anchors are only suitable for concrete or brick walls (is also mentioned in the manual), not for other materials (in my case: Rigips), but in interior design is now popular. This could have been solved the tie by adding Fischer UX universal plug, or an indication of Metal expansion. The screws that are in the wall, can not be edited with a slit or cross screwdriver, you need socket wrench. Fortunately, I have some.
The manual is understandable and in correct German, but omitted a reference that one should look at before the thickness of the connections, and a list of tools that you need. What is missing also, is the indication that you should first hang the TV only to the upper rail, because he can be tilted reinzustecken to the cable. (This I knew fortunately now)
The built-in level was wrong this time. That must be an outlier, then at the other holder she was OK. Luckily, I'm a careful type and had always a "right" level at hand.
Thus, the installation went fairly straightforward because of the previous experience and in half the time.
In summary, the product has not been sufficiently tested by its own employees, and it was too much to save to achieve a low price. Hama should understand that buyers are only in rare cases assembly professionals.