Not sure if I’m explaining myself correctly. The RCA wires that come from the Onkyo receiver would plug into the ports on my old tv and I could then hear the sound from the tv via the separate speakers attached to the receiver. This new tv only has HDMI, HDMI ARC and Optical ports, which the older Onkyo receiver does not. The question is how do I connect the port (whichever one) on the back to of the tv to the receiver in order to hear the sound from the speakers? I just ordered the optical cable with the converter (based upon another response to my question) but not sure if that is the correct device to make this work. Thanks for trying to help this electronics-challenged person figure this out!