I'm trying to install a USA spec in my '03 avalon with JBL 6 disc changer and navigation. There are 2 plugs plugged into the back of the radio. The one is full of wires, the other only has a white wire and a pink wire going into it. The USA spec is supposed to plug into this location. When I unplug the connector with two wires, the NAV becomes unresponsive. Has anyone run into this problem? What do these wires (pink and white) go to? Can I just splice them into the USA Spec wiring harness in the same location?