I am an ME student working on SAE baja(off-road car competition) we are implementing 4X4 differentials and our front diff has a servo motor that engages three different modes. We need help making a simple switch system to engage this any help or advice would be appreciated. The servo its self has two plugs on it one is a 4pin and the other is a 5 pin, the link below will show you.
*Here is the link to the diagram____


Here are my questions
1)can you just wire a 3 position switch right to the pins to activate the proper modes
2)do you need relays
3)what is the simplest way to do this
thank you