Use a spudger to pry the outward facing camera from its resting place on the top outer case.

Remove the single Phillips screw securing the inward facing camera's bracket to the top inner case.

Carefully pull the camera ribbon cable through the hollow right hinge, being careful not to rip it or the display ribbon cable.

The DSi XL has two digital cameras; one on the internal hinge pointed toward the user and the other pointed away from the top outer case.