I took apart my Nav/BT box today. There was a Black colored coax connector that pluged into the blk coded port on the box, There was a white colored coax connector that plugged into the wht coded port.....

Does anyone know the function of the wht or blk coax? My guess is one's the antenna and the other is the feed to the nav screen. But which is which?

Does anyone know what the purple and blue coded ports are for? My guess is this is where the Video/TV module connect for the pass-thru to the nav screen.

If my guess is correct has anyone tried to use these to send a after market unit's video signal to the nav screen?

Thanks