Okay, in the front room you have a flat panel TV and a Radio/DVD player built in a cabinet.
In the rear you have a flat panel TV with a built in DVD player, which does not seem to be any input connection.
There is a coax cable connection by the rear TV. You will need a cable from the wall connection to the TV.
Up front you need to determine if there is any other connection other than the built in player to the TV.
I'm having a hard time explaining this not knowing what else is in the front cabinet for the TV equipment. Normally an RV will have a basic RF connection outside in a cabinet to feed the campground cable to your TV. The built in DVD/Radio has an RF output cable or a HDMI cable. If you have an RF cable from the DVD player, there is normally a box with selection buttons on the front and RF connectors on the back. There are normally three inputs on the back and three outputs. The inputs are CABLE, ANTENNA and AUXILLARY. There are normally three out puts, FRONT TV, REAR TV and AUX.
Most TVs only have one RF input connection, the newer TVs have several connections but only one RF connector there for there has to be someway to connect different sources. The installation instruction have examples of various methods of connecting all the different components.
In an RV, there are usually two TVs and there for a BOMB or several AB switches built into one box to connect different things to different TVs.
You can use any splitter to connect the DVD player to the front TV and to the cable going to the rear TV.
This has gotten complicated, I'm sure someone here can explain it better than I did but basically it is just like in your home except the splitters/A-B switches are al built into one box.
If you still have questions and you know anyone who has an RV, ask them to show you how they have theirs hooked up or PM me and I'll try and help by phone(I'll even call you if you want.