I need a little wiring assistance. I have a 240 Volt, 2 wire pump and a Square D, 40-60 pressure switch. The 2 hot wires from the pump go to the two center terminals on the pressure switch and the ground of course goes to one of the ground screws. When I run the wires from the breaker box, the black and red (hot wires)go to the two outside terminals, the ground goes to a ground screw. Where does the white neutral wire go in the pressure switch?? Square D makes no mention of the neutral wire in their wiring diagram. Do I just run it to a ground screw?

Thanks for your help!