Ditto. There are several modules affixed to the back wall inside the door just fore of the curbside, dual tires where the black and gray waste tanks are also located. Our tanks report to the Silverleaf screen located in the dash right-side of the steering wheel. The waste tank wiring travels forward and eventually enter the electrical bay where they are plugged into a Silverleaf interface module (TM-105, I believe it is) From that module, the wiring goes into the dash and is connected to the back of the Silverleaf.