URGENT HELP, advice much appreciated.

[jablitt]

Ok, im fitting a 172 alarm to my 172 which didnt have one as standard. i've nearly done but im stuck. on page 6 of the diagram below it says that you simply plug in the main wire of the alarm into a wire already in the car (i think). i cant find this wire though. please help!!!!

 

[jablitt]

lol, please, anyone??

 

[jablitt]

can no one shed light on this??