LOL! So far, nobody ever figured it out. It's tricky!
The LED in the center of the J1772 handle connector is superior to all other methods I've experimented with. The Voltec LED on the bottom is not as useful, as it is obscured, but better than nothing.
The labor to add this feature to 2011-2012 OEM EVSE's was too cost-prohibitive to consider implementation, and on 2013 it's almost impossible without permanent damage to the handle.
Like most people, I'd say once you do it a few times, it's simple even in total darkness. Nissan solved the issue on the 2013's by adding the LED we suggested in 2011.
If you must have one, the best solution is the motion-LED light, it works ok, at least for a year or so.
-Phil