Power Acoustik PTID-900 Car DVD Player "stereo warning please stop" Questions

PLEASE help... Because thats the main reason I bout it..... PTID-5300 Its illegal to watch a dvd/tv when the vehicle is moving so the manufacturer disables the function.. Usually by connecting a cable

...WARNING PLEASE STOP WATCH VIDEO PLAYER". How do I get videos to play? I am not sure about that brand but you are relly supposed to connect the wire coming out of the back of the screen that says ...