hey...which one of the xtrons dvd player you bought, you got the link or the picture, there should be one cable label BRAKE cable, if you connect the brake cable to the ground, then you can watch the DVD on your move, but for safely reason, that cable is suggeste to connect to your handbrake, so when your handbrake is on then you can watch the movie. will this help
from Xtrons, December 2008