I found a picture of a rear panel for a VSX-523. In this picture there is a DVD IN with yellow, red and white RCA jacks. You would hook up the red and white from the hdmi audio extractor to the red and white DVD IN and select DVD on your receiver.
So in your second post where you say "but there is video in for DVD/TV with an in L and R port below that. Would that be it? ". That sounds like IT. Make sure you select DVD/TV as the input for your receiver.