Using adapter for PCIe to m.2 SSD on pcie slots ...
They can be inserted on the extra pcie 2.0 x16 or x4 or x8 slots on the motherboard and on the adapter will be the m.2 SSD.
1U PCIe x16 1-slot Riser Card F1UL16RISER3
MSI Windows 10 PC Laptops & Netbooks for sale | eBay UK
Khe cắm mở rộng: 2 x PCIe 5.0 x16 slots (supports x16 or x8/x8 modes), 1 x PCIe 4.0 x16 slot (supports x4 mode).
PCI Express - Wikipedia
How many PCI-E x16 slots does the motherboard have? – Learn about MSI - PRO Z890-P WIFI (Socket LGA 1851) Intel Z890 ATX DDR5 Wi-Fi 7 Motherboard - Black with 1 Answer – Best Buy.