In my 2015 Q50 Premium AWD w/ Bose & Nav, there is a third power socket in the little door below the lower display screen. The first two are in the center console. Those two are in the service manuals, tracing back to a 20A fuse #25. This third, single socket, however, doesn't appear to be documented at all in the service manuals. I'm trying to find the power source for that, to understand how much can be plugged into all three sockets. Is it tied to the others in #25? Is it on another fuse? Thx

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Thx, but still looking for the circuit on which the third socket runs; what is the total capacity of all three? The two in the console bin are on one 20A fuse. What is the third one (below the display) running on?

While INfiniti has changed the way they publish FSM's you can look at the 2014-2015 Q50 FSM to trace that connection. I'm sure it's the same on later models and the Q60.

https://www.nicoclub.com/infiniti-service-manuals