I got a few pictures from a friendly mechanic of the inside of part of the BCB. I must admit I was suprised!
First, for reference, the buildup. The left sub-box contains charger electronics (no pictures), the right sub-box is the main power interconnect.
Cover removed. See image above for the connectors. The Neutral point connector goes directly into the motor. What is marked as signal connector are two smaller ones, the top one going to the charge connector lock motor, the other probably the CANbus. What they call the Converter, is technically known as the PEB. Note the 40 amp fuses between the battery wires and the heat pump connector, snugged away against the forward wall. Also note the orange bus-bars connecting the battery and the interconnect to the inverter against the aft wall. I suspect the third connector is for the high power rheostats, that are only installed in the cold climate versions of the ZOE.
Upper half, containing plugs and wiring removed. The blue box is a triple capacitor. The two black components I cannot identify, but I suspect the left one being a coil, and the right one being an integrated charger.
The removed upper half. The cable to the charging plug in the nose is connected to the other, closed half of the BCB, left bottom.
Re-applying heat conducting paste to the charger module.
Nicely cleaned bottom, ready to accept the modules covered in heat conducting paste again.
Note: The rotor cable, as well as the three phase cables to the motor come directly from the PEB.