Lee I think Abacus is correct, he only adapted a Wersi organ cabinet. I watched a video that I can't find now in which he shows how he made it up. The connection from the M audio to the Tyros I believe is a simple Midi Out-In type but he needed a special board for adapting the pedals to the Tyros and he required a Midi coupler for the Tyros Midi In or a connection via Usb to be able to use the M Audio controller and the pedalboard.

Ian has an idea I also thought but those low end organs are too narrow (less than 114 cm/45 inches) and you need to do some work to adapt external pedalboard and the volume/sustain pedals. Besides, believe it or not, I think I could never destroy an organ