The sidestand switch, is a double pole single throw switch (Technical term for a switch with two on positions, changed by moving the switch). When the side stand is down, the engine is unable to be started, and the sidestand caution light is on. With the sidestand up, the light is off and engine can be started. There is a position between down and up where the light is out, but the engine wont start.
On the Police bikes, there is a bullet connector in the green wire (sidestand up line ). When the bullets are separated, and wired to/through a barrel key switch which allows the side stand up to be disabled. This means that the bike can be left running in neutral, but should any one jump on the bike and try to ride away, then as soon as the bike is put in gear and the clutch let out the engine will stop. The bike cant be restarted until the sidestand up bypass switch has the normal position selected.
Hope this explains what you were after.