I have the same coach. I also replaced the front with a 32. For sound wiring, the Panasonic amp has a TV sound input. (RCA) I connected that to the TVs sound output.
Then I connected the sat box, Blu-ray, Appletv via HDMI Cables. OTA via coax to ant.
Then I use the tv remote to change sources (inputs) and the Panasonic amp is always on the tv input PLUS you get full surround sound from every device.
I don’t use the old dvd or CD player. I play music thru the Appletv.
Big Katuna
I will show what you wrote to my son he is good with this stuff and see if he can figure out the surround sound. Thanks. Did you see my post about changing the flooring have you done that?
My flooring post.