This is the tricky part: the rest of the motor cartridge is two pieces held together by 5 snap tabs. Use your pry tools to push these tabs in, and stick a pry tool between the two halves to work your way around the clips. I started with the top clip (as seen in the first photo), then the left and right, then the bottom ones.

Use the second image as a reference to see where the seam is between the two halves.