Connect the external mini SAS 26 pin connector on your controller to four 29 pin SAS connectors on your SAS hard drives.
Also works with SATA drives. Power is supplied via the pass-through Molex 4 Pin power connectors, so you would need up to four Molex-style power connectors available - see Related Items on the description page for adapters that may help.
Type: Internal to External SAS / SATA Cable
Connector 1: SFF-8088 (internal mini SAS, 26 pin mini SAS)
Connector 2: SFF-8482 (SAS 29 pin / Power)
Length: 1 Meter(3.3 ft)/2 Meter(6.6 ft)
1 x SFF-8088 to 4 SFF 8482 SAS29P Power Cabe