I am installing a Pumptrol pressure switch class 9013. Where do I hook the black and white wires coming from the box and where do I hook the black and white wires coming from the motor?

There are two sets of contacts. Put both black wires on one side and both white wires to the other side. So from left to right, for instance, it will be white, white, black, black.

Check this out: http://www.catskillhouse.us/blog/wp-...tch-wiring.jpg