I connected mine by extending the wire and connecting it in the passenger side kick panel. Photos can be seen here. Under standard head unit wiring, blue/white usually represents a remote turn on for an amplifier. If you have a multimeter you can test to see if this wire goes to +12v when the head unit is turned on. If so, you can use this to turn on any amps you have/plan to have in the future. Looking at the diagram in the manual you have provided, this seems to be the likely candidate since there is no other wire marked for the amp remote trigger. Previously I thought the 'CNTR' stood for 'CENTRE', but I guess they meant 'CONTROL'. Leave disconnected. Chances are you don't have any hardware to utilise it. Just connect it to the casing of the head unit. Secure it under a screw that holds it together. I connected the pink wire as you suggested. But with my unit the reverse camera stays on all the time, I cannot get in to any other application. Any ideas!