Looking further down your picture. It looks like you are using a host adapter for your iPad as well. A MIDI host cannot talk to another MIDI host so your configuration would not work. For USB one end needs to be a device and the other end a host.
Rather, maybe you should connect your iPad through an ethernet adapter and use Bome Network on your iPad to talk to your BomeBox. Then the BomeBox would be the host for all connected devices. You could also use WiFi for your iPad instead of ethernet if you have a well controlled WiFi environment.