After powering off the device, remove the 7 PH#0 screws on the bottom.

The screws are captive, so they will stay attached to the bottom lid and won't get lost. Nice touch by Lenovo.

There are clips holding the bottom on. They are located on in the top corners. Lightly pry with a spudger. The clips only require a small amount of force to release.

Always disconnect the battery. On this device, the connector slides to right and pops up. Don't use a metal tool for this!

M.2 slots are on the right center. Remember to remove the plastic film before adding a new drive in the bottom slot.

The SO-DIMM ram slots are in the center covered by plastic shields. If you are changing the ram, remember to buy 2 matching ddr4 so-dimm sticks.

My ram configuration is 2 by 8 gb of 2666MHz.