Clifford alarm: "Channel 2 accessory"?

If you connect a window module like Clifford Smart Windows, the windows
could close on arm and then CH2 could be used to crack them for
ventilation or roll down all the way.

JD

DaveC wrote:

One unused wire on the harness plug of this IntelliGuard 200 alarm is labeled
(on the diagram) "channel 2 accessory".

I presume that this a feature that is enabled by pressing the Channel 2
button on the remote.

How can this output be used to control, say, window roll-down (1-inch, for
example). How is a secondary channel/accessory commonly utilized?

Thanks,