2 slots which slot is faster?

Unable to use 2nd NVME SSD which m 2 slot to use 2 slot 6160 MBs READ and 6621 MBs WRITE The bottom slot 6075 MBs READ and 6229 MBs WRITE I use the latest CrystalDiskMark for testing which interview slot is best 22 mm × 110 mm A size comparison of an mSATA SSD and an 2242 SSD 2 modules with two notches in B and M positions use up to two PCI Express

which slot machines are the best to play I Guess what I am after is to know if an SSD can go in this slot Well since the does have 2 PCIe lanes it is possible to put there a