Does anyone here know how to properly install the switch that allows you to watch movies while you are driving on a jensen flip up screen head unit?

 

jensen i believe does not use a switch as does duel (same company panasonic screens) its coded need to know model number to help i it is VM9311, 9411, 9511TS,9021T2 go here http://forum.ecoustics.com/bbs/messages/4/278797.html the first guy is trying to sell it scroll down another tell how

 

if not just do a search off model number and make year because they change software