Rear cam install

[Fordy]

Hi guys and gals im installing a rear cam for my ford focus 2008 titanium im trying to locate the reverse wire positive in the car could somebody tell me where the wire will be as my cars reverse light is on the left rear bumper side below the tailgate and i didnt want to connect the wire that far down do these wires come up through the rear boot and where abouuts will they be

Many thanks for any help i have put up a picture of the position of my reverse light


Cheers