in-dash dvd player wiring

new here, hello hello! i need some serious help, does anyone know how to bypass the safety feature on in-dash dvd players? even when the parking brake IS on, the video still will not display and no one can figure out why. stupidly, we cut wires and can no longer return it, so my only other option is to bypass it. any ideas?

With mine i just grounded that wire. Not sure if it will/is the same on yours.