dumb switch question

i have always used prewired switch boxes. now i am going to make my own switch box the only thing is i dont know how to wire the switch(3 prong) up. help

How many are you gonna use? Just 1? Or more? Cuz you might have to jump power (or ground) across all of the switches you use

just going to run 2 in the front and 2 in the rear

12V goes to the center prong. One of the other prongs goes to the lift/dump valve for that particular corner.