I pulled the 100-watt Federal Signal siren amplifier and speaker, and the solid state wig-wag flasher out of my Camaro, and want to put both in my Vibe. Both systems are 12-volt direct connects, but without a schematic, I have no idea where to splice-in. Lightbars and red strobes are illegal in this...

Volunteer firefighter here, looking to install lights and siren in my 2004AWD. Has anyone else had experience with this?