I hope someone else will find this, hence all the model numbers for searches.
When you change the oven element, you unscrew the back-plate inside the oven to expose the fan and element, but then some crazy designer decided to screw the element in from the back. Yippee.
You will need to remove the dozen or so screws holding the back cover on. It is the full height of the oven from the floor to the top of the appliance.
Once removed, pull off the elements contact wires (pulling the plug-bits, not the wires) and undo the the two screws.
Remove the element, reverse the procedure with the new element but be careful when replacing the back-cover; ensure the two vent flue-pipes are fitted into the very top notches of the said back-plate.
Once done, everything is tickety-boo. I hope this will help someone!
Phil Woolfold