12 VDC, 30 amp, On-Off-On Rocker Switch comes with built-in jumper bars for polarity reversing. Simply connect power,  ground, and two DC motor leads and the switch will reverse the motor direction. This heavy-duty switch mounts in a 0.83 x 1.48 inch hole and it has 1/4 quick connect terminals. Internal gasket keeps water & dust out of contacts.