I do not have a fan on mine. I had a little overheating when I was learning to ride, but haven't had a problem since. Computer fans seems to be a common fix as they are less expensive than KTM. That lower switch on the numberplate is for sure aftermarket. Can't help with that RC plug??
That pic of the pressure switch is right for the tail light. It could have a mechanical switch wired at the rear brake instead. Why bother with turn signals? If you do, just use led's and don't worry about the stator.
98 uzj100. Factory rear-ARB front locked 4.88's. ARB Bull, Warn 9000, Irbis rear bumper, Slee sliders and belly pan. OME t-bars w/863 rears, HID, XM