Xibo multiple different displays - asymmetrical videowall

Hello Xibo community,

we want to switch our asymmetrical videowall to Xibo but I have no clue on how to operate this particular system.

This PC is using Windows 7 and has 1 graphic card with 6 outputs. There are going 6 HDMI cables to 6 different displays.
Three of them are 960x960px and the other three are 1920x1080px.

I will attach images because I cannot describe with words how they are arranged.

Can you please help me on how to operate our system? We want to show videos and images.
In the images attached I tried to show one big image but I miserably failed.

Thank you very much in advance!

Greetings from Germany,