In the 2005 model year, ford relocated the dark car electrical connectors to behind the trim panel underneath the steering column. Below are a couple pictures of the dark car toggle connector setup used in 2005 crownvics.

Keep in mind that the darkcar electrical connectors pictured above are only present in 2005 police cruisers. The electrical connectors to toggle the dark car feature in 1995-2004 crown victoria police interceptors are located underneath the glovebox. And starting in 2006, the dark car feature is toggled using specialty equipment at your local ford dealership.