Intel Braswell Series Technical Manual page 20

(3) ATX2P (2-pin Block): Internal 12V DC-in Power Connector
(4) SATA1 (7-pin Block): SATAIII Port connector
SATA1 port is a high-speed SATAIII port that supports 6GB/s transfer rate.
Pin1
Pin. Definition
1 GND
2 +12V DC_IN
Pin No. Definition
1 GND
2 TXP
3 TXN
4 GND
5 RXN
6 RXP
7 GND
15