Talleysit,  You indeed need another cable. The cable needed is part # F63HD.  Let me know if this helps. 
Hi, I've installed the H730p RAID into the R630 server, but the SAS cables from the front drive arrays A & B connect to the main board and have no play in them to connect to the RAID card. I assume I need new SAS cables, but cannot find any reference to these anywhere.. Do I need new cables and what are the part numbers please? many thanks Pete
installed H730P into R630 How to connect SAS drives?