There are many differing break out cables available for many different things
What you must realize about a break out cable, video , audio, lan , what ever
IS they do not convert signals they simply split the signals off to be carried by a different set of wires, sometimes for testing purposes, sometimes so you can use existing cabling wiring, without pulling new cable ( just like the adapters people use When replacing the rearview camera system , new system old oem cable , new adapters for mating things together )
New HDMI signal at source end, new hdmi tv at the receiving end rgb cable in the ceiling
Break out cable adapter on each end, let's the old cable carry the new HDMI signal to the new tv using the old existing rgb cable in the ceiling
This will Not convert hdmi to component rgb for an old tv
There are conversion boxes that do that, but not this break out cable
(2) break out cables and some rca barrel connectors for coupling and a new tv
Ready to go , no new cable pull in, under, or thru the RV