wiring help needed

[meicalnissyen]

Have a rear view camera installed, just got it physically in last nite, it needs 12v and I dont want to run the power lead all over the place. From the bundle of wires under the trim fascia on the rear hatch, which wires would be good for running the camera? The back up lights are the best choice, since the stereo switches to the rear camera when it see +12v on its reverse lead.
but I wonder about the power up time for the camera itself

 

[Donewood]

Have you got this sorted? I just did this last weekend and it wasn't easy but my instal leaves no visible wires.