Tim it looks like you have been around the track on this "radio" topic on Kubota RTV............I have a 2017 RTV X1100C looks like yours ..... I didn't buy it with the radio, but I popped off the panel above the mirror and I see the wiring back there, (9 pin plug short harness and the cable to the antennae) yes mine has antennae already there on the roof............now do you think my RTV already has speakers in it somewhere , even if it is the cheapees, and they just sound thru the headliner without me needing to worry about where ? If so then I do have radio that came out of a 2012 jayco travel trailer , and I want to just connect it to the 9 pin plug, except this radio has a different plug. Is that why you folks have to trace each wire and solder or does some radio shops maybe have a plug adapter that goes from 9 pin to the plug on the back of the radio I have....... seems too much to hope for , but curious on your thoughts