On my 2903 the dvd player went to the tv through the channel modulator built into the switch do you have to switch the tv to channel 3, then turn on the modulator and switch it to DVD.
This is of course silly, there should've been an HDMI cable run from the player to the TV, but it does allow you to see it in the back, of course you're running at 480i res at that point and not 1080p, which all the TV's are capable of. I replaced my player with a fairly cheap Sony BluRay player which supports networked play (Netflix, Amazon etc) and can play off a USB key (Media files) as well as blu-rays.
Then I used an IO Gear wireless HDMI rig to send the signal in 1080 to the rear TV, which also does IR control back, allowing me to control the unit from the bedroom. Then I removed the front TV and drilled a hole through the cabinet between the TV and the player to run an HDMI cable there as well.
2015 Newmar BayStar Sport 2903 (The downsized)