Thinkpad L15 Gen 3 My unit came with 1 16gb in use, 1 socket open (which I populated with another 16gb) Cover for the M2 SSD. The original SSD is single-sided. Using a dual-sided replacement, it still works/fits, but it’s bending over a bit when screwed in. Not super happy with the routing of those two cables. The empty slot for the GSM card? I tried installing the M2 SSD here, but it’s not keyed quite right. Disassembly is easy as long as you don’t miss this one screw. Use a driver’s license or credit card to split the case after removing all the screws. No heroics involved.