An assembly includes a mounting bracket; a member; a guide disposed in the member; and a slider, the slider configured to move between a first position and a second position relative to the member, the slider being configured to move within the guide. The slider has a first end and a second end, the first end opposite the second end. The first end includes a first portion and a second portion, the first portion configured to provide a contact for application of a force in a first direction and the second portion configured to provide a contact for application of a force in a second direction. The second direction is opposite the first direction.