How to wire a 2nd siren (DEI) into Viper alarm?

[Hybrid93Hatch]

am getting my alarm installed tommorrow at Circuit City. I mounted the 2 sirens (the 850VX siren & a DEI Piezo) myslef since I did not want them to be visible when looking at the engine bay. I am wanting to run the wires back to where the brain will be. Do I have to run all 4 wires back to the brain or can I splice the 2 sirens together (black with black / red&black with red&black) and run 2 wires back to the brain loaction? The 2 sirens are located next to each other and which is why I ask.

I do plan to add another Piezo or 2 (inside the car) in the future.

Thanks for any help on this!

PS <> Each siren has 2 wires: 1) red 2) red/black

[BullShifter]

Oh not Circut Shitty!
Why do you need all those noise makers, the louder it is the less likely someone will pay attention to it. The only thing car alarms are good for is annoying people. If they want the car bad enough, they gonna get it 500 alarms or none.