Batboard

I'm in the middle of an install on an 2004 Civilian Impala, and need to hook the smart siren up to the horn. does anyone know which wires go to the horn, also does anyone have any sort of diagram other than what comes with the Smart Siren?

Thanks for the help

Conundrum

Try here, you can find any vehicle here: http://www.bulldogsecurity.com/diagrams/diagrams.htm