Your tractor will have some dual safety switches and some single switches. Those dual switches will have 4 wires to them and singles will have only 2. Actually there is only 2 wires and 1 wire being those switches function is to connect a broken wire so to speak.
The wires in the cranking circuit will need to be jumpered in the connection after it is un-plugged from the switch so current gets to the starter solenoid.