It was most likely mounted close to the drivers seat, as you would need to turn the valve to lower the plow (the handle looks to be broke off). Not really sure why there are two lines as its a one way setup. Electrically you need a starter relay for a switch and a momentary switch to controll that, or simplify things and use a Willys floor starter switch.... Operation, close the valve on the side, push button to engage motor, plow goes up, open valve plow goes down... Pretty simple.
Lee
