X2, but wrong terminology.
What you want is a 4 TERMINAL switch, which is "two pole"
A 2 terminal switch is "single pole"
yes your right... doh!
You can take the second set of contacts, ground one terminal, run the other forward and hook to one end of a relay coil. Use your switched ignition to trigger the other end of the relay, and use the relay contacts to either kill ignition, or to kill the alternator field.
rather than run a relay just cut the blue/yellow wire going to the ballast and run the one half to the small terminal and then the other half to the other small terminal... this kills ignition and VR...