It might be a good idea to remove the battery and press the power button to discharge any stored power from the system. There's little risk of electrostatic damage in this repair, but if you're prone to generating sparks in your environment, take suitable precautions.
Since the removed screws are quite small, consider to have a piece of stiff paper stock or light cardboard stock nearby, to serve as a keeper. The advantage of paper or cardstock is that you can pop tiny holes into the cardboard in the same placement as the original screw locations, to make it all the easier to put it back together without missing anything. I also write notes on the card, if there's a possibility of error.
This replacement turned out to be easier than replacing a mainboard in a laptop, so the notes aspect wasn't really necessary. If you are interrupted in the replacement process and can't return for an extended period, the notes and card stock would be more useful.
Step 1: Screwy
Begin by prying off with a small screwdriver or similar tool the rubber bumpers that also serve as cosmetic screw covers. Place each screw in the appropriate relative location in the cardboard organizer. The last image showing the button removed and the screw head is out of focus because the camera is having a very difficult time with the reflective surfaces.