The DAM controller is bolted to the left side of the grain tank. Open the door on the left side of the machine at the top of the steps, were you check hydraulic oil. There are two self tapping screws that hold it to the grain tank wall. As for the digital display its a self contained system. Power and ground in and leads to the four speed sensors. I have the service manual in the shop, will take a look tomorrow and post back. I know Deere wants close to a grand for a rebuilt one. All States Ag Parts has rebuilt ones for about half.