You have two SATA III (6Gb/s) ports. Connect your boot SSD (2.5" or M.2 SATA via adapter) to the dark blue port. Leave the black SATA II ports for hard drives or optical drives. Note: —there is no M.2 slot and no BIOS support for NVMe protocols.
While the marking appears on different parts, motherboards bearing similar Pegatron identifiers for HP often feature:
