Hello, The Vizio indeed does work with that player- the Red,White and Yellow cables connect to the Vizio in the following order:
Yellow cable---->Green "Y/Video" port on Vizio.
Red and White cables- to red and white respectively.
TV Input set to "AV/Video".
Anyhow, since you already returned it, ANY brand new DVD/Blu Ray player (The Sony is NOT that- it is a CD/DVD player) will have an HDMI port. Simply look at the box on the shelf and it will say "HDMI" if it has an HDMI port. The unit at the link below available at WalMart does have an HDMI port:
Additionally, I do not understand at all what you mean here:
"WHERE WOULD I CONNECT ALL THE WIRES FROM SPEAKERS IN THIS RV"
You have an RV? If so, I would not know anything about the speakers in the RV without seeing them or having you tell me what you have.
If you can elaborate on this I can help further.
If you need further assistance let me know. Before you go, PLEASE DO click at least a 3 STAR RATING, at the top your screen. That is how I am credited for my efforts by the site.
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Please advise if you need any further assistance with this?