Ensure the LCD screen is swung fully to the left before taking off the back panel.

Use the iFixit opening tool to pry off the back panel.

Don't completely pull off the back panel because there is still a ribbon attached.

Use the black spudger to unclip the ribbon located behind the battery compartment. Then remove it using the nylon tipped tweezers.

Once the ribbon is unplugged, remove the back panel from the camera body.