Sorry ‘bout that - I was in a hurry, and didn’t explain the circuit, and the Bilge Pump
drawing has a bunch of extraneous wires that don’t apply to your application. Just use the “sloppy” sketches added top left & bottom.
There’s two ways to turn both switched circuits “off”.
1. Turn “off” the circuit breaker supplying +12VDC to the centre ‘common’ terminal of the switch.
2. Use a SPDT switch c/w “centre off” position: On2-Off-On1 - or any other combination like Wheels said.