Typical Strat three-pickup wiring. The switch is usually installed with the spring facing away from the pots, but can face either way; there's no difference, electronically.

Reduce unwanted electrical noise by using shielded coaxial cable for your longer wiring runs (for example, the connection between the controls and the output jack).
Coaxial cable contains a center "hot" conductor which is shielded by an outer braid used for the ground wire.


For short connections between components, use standard non-shielded wire. Typically, white wire is used for hot and black for ground.