I just installed a new head unit in an 05 LS with a reverse camera . The camera works fine when I select camera and have the car in reverse. There is a wire labeled reverse on the new head unit, I assume that is what switches the screen automatically to the camera image when placed in reverse. Is there any where up front to get 12v when in reverse or do I need to run a wire back to the trunk where I got the power from the reverse lights for the camera?