The back panel with all electronics has come off nicely.

As you can see, there is four screws on the black back of the speaker compartment which you need to attack in a later step.

I am showing it here so that you can prepare the tool, it is not yet time to take them out. First, we have to remove the carrying handle and the from grille as well as the speaker.

Please make sure you get a tool that helps you (In german this would be an 'Imbus', a small one)