[boost please]
Any idea what the two types of screws needed here are?

Image description inline because context needed: this is a #GlobalScale #Mochabin 5G board. Their block diagram is incorrect (possibly from the original Mochabin?) and doesn't seem to list one of these slots.

Near the bottom of the images are 4 threaded holes using two different machine screw sizes.

Should be NVMe, NVMe (?) and mPCIe, but I would have thought these all use the same #fastener size