Asus RS520-X5/PS8 - Manual (Page 51)

ASUS RS520-X5/PS8 4-9
3. Serial ATA connectors
(7-pin SATA1, SATA2, SATA3, SATA4, SATA5, SATA6 )
These connectors are for the Serial ATA signal cables for Serial ATA hard disk
drives.
4. Hard disk activity LED connector (4-pin HDLED1)
This connector is used to connect to a hard disk drive active LED connector
on the SCSI or RAID card.