A connection module for a portable electronic device is disclosed. The connection module includes a mating structure that is configured to attach to a mating structure interface of the portable electronic device. The mating structure includes a fixed alignment projection disposed on a first end of the mating structure, a retractable alignment projection disposed on a second end of the mating structure, and a retractable electrical connector disposed between the fixed alignment projection and the retractable alignment projection. The retractable electrical connector and the retractable alignment projection are fixed relative to each other and movable relative to the fixed alignment projection.