Thinking about this, they need to have a 9.6 kW inverter internal to the CT to power the 240V receptacle. But they wouldn’t have spare inverter capacity for this PowerShare Mobile Connector, so the PowerShare Mobile Connector must have a built in inverter, and, as you surmise, must be plugged into the NACS port so that it can slurp DC power. In that case, surely this mythical Powershare Mobile Connector could also be used in any Tesla to deliver 7.2 kW at 240V, which would be awesome. No bidirectional charger needed in Teslas, just what it currently has, which is direct connection between NACS and the battery.