An apparatus for mounting a device having electrical terminals includes a bracket and a tray. The bracket has two first protruding portions and two pivoting mechanisms adapted to be connected to a base. The tray is positioned between the bracket and the base and adapted to carry the device having electrical terminals. The tray has a bottom surface and two first protrusions. When the bracket is pivotally connected to the base and when the bracket is rotated so that the first protruding portions slide on the first protrusions, the first protrusions are pushed to move toward the pivoting mechanisms and drive the bottom surface to move.