Hi oenone,
You should reach the webinterface of Max2Play by typing “http://max2play/” in one of your home network’s devices’ browser. You can also check your router’s interface to see if it gave Max2Play an IP, you can then use this IP to access the web interface as well. Max2Play is a headless image, the direct connection of a screen is only necessary for outputs of Jivelite or Kodi. The control happens all through the web interface, no console commands necessary. For more info, take a look at our introduction video (https://www.youtube.com/watch?v=pZB4aSiW4c0) and our other videos.