Per JD DEERE 650, 750 LAMPADINA FARO LED (2 LAMPADINE)12V 35/35W 2T80 3T80 CH15208
And many others. and many others (see list below of just a few tractors they fit). They fit directly into your OEM wiring harness sockets. They are non-polarity, so you just plug them in. It is as easy as changing a light bulb.