I have to connect my Sharp VCR and a DVD player through an audio-video connector since my TV can accept only one set of inputs. The preferred device is controlled by pushing the button corresponding with the device connected. The problem is the connector expects white and red audio input plugs and a yellow video input plug but the Sharp VCR only seems to provide a single audio plug as output along with the yellow video output plug. How do I connect the VCR in this case?