This cable by Delock is used to connect a device with 22 pin SATA interface via a free SATA 7 pin port and a free 2 pin power connector of the mainboard, as found on the Banana Pi, for example. The metal clips on the SATA sockets ensure that the cables snap into place reliably.

Specification
– Connectors:
1 x SATA 6 Gb/s 7 pin female + 1 x 2 pin power female >
1 x SATA 6 Gb/s 22 pin female straight
– Pitch: 2.50 mm
– Data transfer rate up to 6 Gb/s
– Backward compatible to SATA 1.5 Gb/s and 3 Gb/s
– Voltage: 5 V
– Wire cross-section:
26 AWG data line
20 AWG power line
– E.g. for use with the Banana Slot. E.g. for use with the Banana Pi
– Length incl. connectors: approx. 10 cm
System requirements
– One free SATA 7-pin interface
– One free 2-pin power supply connector
Package contents
– SATA cable
Packaging
– Resealable bag