hey I had the same problem just after doing a repair job and I figured it out, if you are still needing help I can send some pix of where and how its placed, actually a lot easier than I thought too. basically open the back, there is a hole in the part of the door that sticks through, and there is another hole in the metal frame holding the cards just near it (close to the battery compartment). sits a bit awkwardly but it works! :) hope that helps, you or anyone else.