This video demonstrates that it is possible to reverse engineer the protocol used to operate the Dynamic Controls Shark motor controller via the Shark Bus on mobility scooters. I should add that I did not reverse engineer the entire thing myself, credit goes to the people that spent their time and efforts on this, which I will post the forum link to below! I will also be better organizing the information and posting a video on how to actually create this controller and reverse engineer your scooter's protocol.
Original forum thread: https://www.wheelchairdriver.com/board/viewtopic.php?f=2&t=4867&start=570
Detailed Summary on my blog: http://blog.arisux.com/2021/01/12/dynamic-controls-shark-bus-protocol-hacked-arduino-sharkbus-controller/#more-47