Besides the M.2-connected solid state drive (SSD) pre-installed in the unit, the Zebra 4Sight XV7 motherboard provides four 7-pin SATA3 data connectors for connecting additional storage devices, such as hard disk drives or solid-state drives (SSDs). If you chose to connect a device to one of these connectors, note that the unit only has space for a maximum of two SATA 2.5" HDD or SSD devices up to 9.5 mm thick. In addition, SATA3 connector 1 is shared with the M.2M-key socket; therefore, this connector is unusable when the M.2 SSD is installed.
When you connect a mass storage device to one of the 7-pin SATA3 data connectors, the operating system and UEFI1 identify it by the SATA connector (port) to which it is connected.
SATA connector 1 is shared with the M.2 module and it is therefore unusable when an M.2 module is installed.
1
On legacy computers, this was referred to as a BIOS, and in some menu items, BIOS and UEFI are still used interchangeably.