Alternator wiring diagram on farmall M tractor

From scratch... well are you using the factory style of alternator or something different as you didn't mention the age and it could be: 12 volt positive or negative ground, or, 6 volt positive or negative ground. Or do you have a starter/generator or ??? Further research suggest you have a generator which would mean you have a voltage regulator somewhere... SO please help us help you. We need to identify your system before we can help... Pictures would be great. Numbers would be good, type of battery would help...