The original cabin has a very unusual power unit/ hydraulic control unit. It needs no additional power unit. and operates by a wireless joystick. With both loads they can control the position of the load. Going down Cedar Point they could raise the front up higher if they want. The first picture is of the one piece unit. and the second picture is of the controller.
On the larger load they mount the main hydraulic unit on a special 5th wheel mount that hooks on the I beams and mount wheels on the back. First picture is of the Power unit with the 5th wheel on it. The second one is of the mounting wheel sets
Ready to go