I don't have that tractor.
That said, for lights, look in your rear fender wells. There's normally a harness in there, probably with a quick-disconnect to power the fender lights.
Use a 12V tester on each wire to find the one that has 12V when you turn on your lights. Obviously, don't use the wire for flashers. If you don't already have a rear work light, there may be a spare wire in the harness for that light that you could use.