Typically you will have a single Yellow (Video input) jack at the back of your TV (along with a Red and a White one, this is for audio only, LH and RH channels, not used by the ZX75). It is the lowest quality connection method by today's standard, HDMI is the way to go now, but the ZX75 does not support that method.
Simply connect that single jack to your wall plate, it has the same connector. You only need 1 cable.
When you insert a DVD, the audio tracks will play on the trailer speakers, the video will play on the television, provided you have changed the Input or Source on your television, look at your remote for the TV, you should see an Input or Source button, by pressing it it will rotate between options, like Antenna/Air, PC, Input 1, HDMI and so on.
Denis & Diane
2010 Sabre 31REDS
Ford F-250 2011
* Happy Campers *