Each window is it's own temp display. The unit doesn't care where you plug in what.
One really cool thing is that you can set limits on each input/window. - I had the rev limit set at 8500, all three cylinders on the old Arctic Cat set at 1350 and then the water temp set at 200.
With three windows available on the unit I had, I had them show (from left to right) RPM, Temp of the HOTTEST cylinder EGT and water temp.
You can also set up "pages" - so one display would be RPM, EGT, H2O, the next page would show each cylinder, next page would show engine RPM, Driven clutch RPM and then MPH.
I think I had up to 10 available pages.
There's a way to only show X number of pages, so you don't have to scroll through 10 sets of them - seems like you set each window to null or zero or sumptin...