Yeah.. it took me forever to find those switches.

I had to use a multimeter to see which prongs on the switch did what. I think they were upside down. From what I remember, here's how they're wired:

Left Switch(Carputer):
Top: ACC/IGN from old radio harness
Middle(Common): M2-ATX's white wire; remote turn-on
Bottom: +12V from old radio harness

Middle Switch(Amplifier-Top/Bottom does not make a difference):
Top: M2-ATX's amplifier remote turn-on pins(check your manual)
Bottom: Amplifier remote turn-on

Right Switch(Sub-Top/Bottom does not make a difference):
Not yet wired. Will be wired as follows:
Top: Middle Switch's bottom wire
Bottom: Subwoofer's remote turn-on