Added internal sata PCI card - where do I get power?

Using one of OWC's brackets to add a SSD and a normal 2.5" drive in the lower optical bay on my 2012 MacPro. Want to continue using the optical drive in the upper bay so have added an internal PCI sata card.

When others have done this where do they get power from? Apple uses a combined power/data cable end on the 2 supplied connectors in the optical bays.

Thanks.

Bill