Which slot should I use for my SSD?

Vantec NVMe + SATA SSD PCIe x4 Adapter m 2 sata ssd slot Two types of SSD Note: SSDs using the PCIe x4 bus use M-keys since it is the only one that supports PCIe x4 lanes m2 sata slot Two types of SSD Note: SSDs using the PCIe x4 bus use M-keys since it is the only one that supports PCIe x4 lanes

m2 slot mainboard These SSD modules are small enough to be installed directly on the motherboard itself, and it only takes a few minutes to secure one of them in