Slot Types

Some of those slots share PCI lanes with the PCIe slots In the one you mentioned it appears that the 3rd slot (M2C, likely means there is an

Mini PCI-E PCI Express to PCI-E 1x Adapter With SIM card Slot US $22 Expansion Slot WiFi Interface to M2 NVME Support 2230-2280 M2 SSD US $

m2 slot types Problem is that the top M2 slot I've seen a post or two before about the expansion slot for this machine being behind

m2 nvme slot 2 expansion card to add an additional Slot to your PC ATX motherboards have ample slots but if you have a small form factor mATX motherboard (usually