The image shows prying the cover open at the bottom right. In fact, there are tabs securing the bottom edge to the frame. The cover needs to be pried open at the top edge. Once the top edge is released, the cover can be shifted slightly toward the top of the image to disengage the tabs at the bottom.

This error, along with the similar error about removing the battery in step 4, suggests that the instructions were written with the laptop in the opposite orientation than what is shown in the images.