Take a look at this picture. The M.2 should be horizontal in the end and screwed in the m.2 standoff on the motherboard using the m.2 screw that came with the case/motherboard/SSD.
Take a look at this picture. The M.2 should be horizontal in the end and screwed in the m.2 standoff on the motherboard using the m.2 screw that came with the case/motherboard/SSD.