Hello Patrick-Dell   You are correct J71RG is validated for the T130 only.   I see one other cable validated for T330/T430: Part# FGVG3  - ASSY,CBL,PWR,ODD,X8/X16BP,T430 Cable, Connector and Cord Assy, Cable ASSY Motherboard to ODD Power Cable, (X8/X16BP)  
I have a T330 and am looking for the lead to connect the 6 pin HDD/ODD_PWR connector to some SATA/SSD drives. The HDD/ODD_PWR is system board connector #22 in my manual. Thanks
PowerEdge T330 HDD/ODD_PWR connector to SATA