Yess it works now! Thanks for your help.
I had to exchange the white cable with the yellow cable and connect it on the PPM Port at the receiver as you said.
I also had to dissolve the tin from the SBUS thing (red arrow) and do some tin on the PPM thing (green arrow) to make it work. (Not done yet on the picture.[ATTACH]1251[/ATTACH][ATTACH]1252[/ATTACH]
Still one last questions left 
I enabled airmode alltime in betaflight.
On my old quad the motors already started spinning when I armed it. They don‘t do on this one. Is that a problem?
