Abstract: A base having a first engaging member, second engaging member, and third engaging member configured to be docked to a docking plate, where the docking plate has a first mating member, a second mating member and a third mating member that are each configured to mate with the first engaging member, second engaging member, and third engaging member, respectively, of the base. The base has a locking mechanism with the third engaging member positioned thereon, and the locking mechanism is moveable between an engaged position and a disengaged position, where the third engaging member is coupled to the third mating member when the locking mechanism is in the engaged position.