Using your fingers, grab the circular tab and push it toward the side of the toaster with the toasting lever.

By pushing the tab, the flange will free itself from the toaster allowing you to pull that side up and free from the toaster.

With the bottom casing open, find the wire holding it onto the toaster. Using a small needle nose pliers thread the wire through the flange attached to the toaster allowing the entire bottom case to be removed from the toaster.