alarm question

[fx gt]

putting a fusion alarm into my corolla
have one problem

i have a wire that goes to the door switches, so that when any 4 doors are opened the alarm goes of

but where do all the 4 door open/closed switches meet up?

[soopachargen]

look for a red with white trace in your drivers kick panel, this should do all your doors, if not you can usually take it from what im guessing will also be a red with white trace running down the a pillar from the interior light.
The wire will go to earth when the door is open, i test this with a test light by connecting one end to 12v power and then the other to the door wire... it should light your light up with each door you open.