The same cable is used to connect the RAID card to the expander (i.e. CBL-0108L-02). Different cables are used to connect the expander to the side of the chassis for cascading purposes (i.e. CBL-0167L for E1 and CBL-0168L for E2). Same external cable is used to connect between the chassis (i.e. head unit to JOB- CBL-0166L).