A securing apparatus includes a housing, a cam member, and a movable device that can be moved in a first direction to engage a first surface of the cam member to cause the cam member to move from a first position to a second position. When the cam member is in the first position, first and second movable members can be moved relative to the housing. When the cam member is in the second position, second and third surfaces of the cam member press respectively against the first and second movable members to trap the first and second movable members respectively between the second and third surfaces of the cam member and the housing such that the first and second movable members are fixed relative to the housing.