I mounted a wireless screen in the combine and in the cart and mounted three cameras on the combine (one on the auger about half way out, one in the front of the grain tank looking in and one as a rear view) and three on the cart (one looking out at the auger, one looking into the tank and one rear view). Because wireless signals are limited to four frequencies I have a toggle switch in each machine to select between powering two cameras. I need to do some more fine tuning but for the first fall they seemed to work very good. Both screens can see all the cameras.