Abstract: A system for removably connecting to a fixed track provided. The system includes an elongate rigid member including a structural frame and an opening disposed within the frame, the opening extending along a portion of a width of the frame, the elongate rigid member further comprising a front surface that defines the opening therein, and a rear surface opposite from the front surface that is planar. An adapter is provided that mates with a rear surface of the rigid member, the adapter further comprising a tooth that defines a void between the tooth and the planar face. The adapter is configured to be received within a first aperture of the plurality of spaced apertures upon the fixed track, such that a portion of the fixed track that defines a lower boundary of the first aperture of the plurality of spaced apertures is received within the void in the adapter.