Chevy with brake controller problem.

I installed a P3 controller in my 07 (new body style) last year. Chevy runs the wiring for a brake controller but doesn't connect the powere feed wire to the terminal stud at the front of the fuse box in the engine compartment and doesn't supply the fuse needed to power that wire. Did the dealer add the fuse in the engine compartment box that is not installed from the factory? They should have also hooked up the power wire for the controller to one of the studs at the front of the same fuse box...that wire is unhooked and usually taped to another harness from the factory. Here is a 2006 examplebut should give you an idea of what to look for.