Trailer Camera

   I am looking for a Camera  hook up for the pickup truck. We have a Camera in the truck tail gate and we pull a trailer most of time.  I am looking for a hook up plug-in so when we connect the trailer we can use the eye on the trailer.
    It could be an extra wire to connect the Camera on the trailer or maybe have it go through the regular trailer plug.
   Could you put this on the next year's trucks that have a Camera?