To
help others:
If its just the ecu connector / loom access wanted then you can get to it from driver side. One screw and pull the side panel back and out from the centre console. Remove foot rest (one screw), then pull carpet back and then remove the footrest support plastic. with M10 socket on the plastic nuts.
To disconnect loom from ecu (ignition off, battery disconnected), push the red tab towards front of car and pull main lever. I had to use a screwdriver to get the lever started.