With the cord cover (#1 in previous step) removed, remove the two connectors

The connectors on my model was protected with plastic strips to prevent me from releasing the lock tap - didn't work - I took the picture AFTER I had removed the cover so it was easier to see what the connectors looked like

Remove the strips or pull them towards the wires (Upwards) and use a flathead screwdriver to prise the lock open and remove the connector

Remove the back cover