You can download the parts catalogue from DUCATI Manuals Resource and look through that to find it.
I think the power lead is behind the headlight with the heated grip wires. You need to pull the headlight/fairing.
Is this lead active by default? Or do you need to have the ECU flashed to enable it?
The nav power wire has voltage and does not need any activation. The heated grip wires do need to be activated by the dealer.
See my photos here:
http://hyperstrada.com/mechanical-technical/200-switched-power-connection-gps-etc.html