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I am in process of converting my dead 2012 Volt charge cable electronics to utlize the OpenEVSE V-5 board and, relay, and current sensor,  All is straightforward until I get to the point of connecting the 5 conductors in the cable itself.  I assume that 4 of them are L1, L2, Ground, and Pilot.  But I do not know the function of the 5th conductor, nor the pin-out of the plug, nor have I been able (after 40 minutes of searching) to determine the unknowns.   I request help in finding the answers.