MSI PRO B550-P GEN3 Manuel D'utilisation page 31

SATA1~6: SATA 6Gb/s Connectors
These connectors are SATA 6Gb/s interface ports. Each connector can connect to one
SATA device.
⚠
Important
Please do not fold the SATA cable at a 90-degree angle. Data loss may result during
∙
transmission otherwise.
SATA cables have identical plugs on either sides of the cable. However, it is
∙
recommended that the flat connector be connected to the motherboard for space
saving purposes.
SATA2
SATA1
29
SATA6
SATA5
SATA4
SATA3