Remove the following covers.
Left lower cover (Left Lower Cover)
Rear middle cover (Rear Middle Cover)
Remove the ground screw from the left side of the machine.
Open the transparent film [A]. (hook×2)
Disconnect two connectors, and then release them from the harness guide [A].
Open the rear upper cover [A].
Release the left hinge [A] of the rear upper cover [B] by slightly bending the rear upper cover inward.
Remove the rear upper cover [A] by sliding it to the left.
When removing the rear upper cover, release the harness [A] from the mainframe.