B550M Steel Legend

Even if your motherboard doesn't have an port, an drive can still be connected using an adapter card that fits a PCIe slot SATA

2 slot connected to the CPU, but have a non-NVME M Yes for the 2nd one MotherboardPRO-B660M-A-

m2 nvme slot 2 slot supports 4X 1 x R7HGK - Thermal pad 1 x YYJF8

m2 slot screw As an example board: asus sabertooth x99 had one nvme slot, 10 sata ports, 2 sata express ports, and either 28 or 40 lanes