Somehow the plug connection was already together, but with the green plug it worked.

I can't put the left bil together at all, who can help, I think I'm too stupid

Hello Chavera Try following the cable from the lamp above the workbench. To do this, you have to jump one picture to the left (connect cable). Then follow the cable exactly to the socket. Then you will find the right cable (right color). You can always check at the workbench by the switch to see if you are right. Does that help you?