I have done the heated seats with the two way switch mounted to the dash. Really nice and makes the wife very happy to go riding on cold days. I bought the heating system off Amazon which are the DORMAN 628-040 Universal Seat Heaters. The three way switch is
HIGH/Off/Low and boy do they work well. I have added photos showing where I mounted the switches which are on the dash under the radio. Please note they are not waterproof but you can buy covers to make them so
Easy to remove the Hog rings on the bottom of the seats and slide in the pads and use the double stick to hold them in place. I did not remove the back of the seat from the base to install just tilted the seat back to gain the room and slide in the pads.