It's a tough area to get a photo of but here it is...
Along the drivers side kick panel and right above the emergency brake pedal is a white plug that allows access for either the XM hook up or the Ipod interface hook up. I use it for my Ipod interface. I am able to control the Ipod through the stereo.
Up higher along the wiring harness in the same area is a second white plug. I'm not sure what it is for. Possibly for a towing brake controller?
Here it is.
Is this similar to the plugs you are seeing?