Husband and I just bought a used 2005 WK about a week ago. It has the rear VES, and we were wondering the same thing. Couldn't figure out how/where the sound comes out. We saw the jacks on the unit and he went and bought a set of corded headphones, but then we realized those were auxiliary jacks. I checked the operating manual but can't find a thing about the VES in it. Searching the web, I found an article which states the DVD volume comes out of the radio speakers, but how? I also came across an installation manual for the entire unit, which shows the wireless headphones. The WK we bought came with no headphones.
So how do you get the DVD volume to play through the radio speakers? And do we need to buy specific VES wireless headphones, or will any wireless headphones work?