Remove the 6 highlighted 1.5 mm screws using a #00 philips head screwdriver.

Pry off the lower two grip pads highlighted in orange.

Remove the two additional 1.5mm screws underneath the lower grip pads using a #00 philips head screwdriver.

You may need to use more force than feels necessary.

Remove the large back panel to reveal the inner workings.

The CPU can be found underneath the heatsink, highlighted in yellow.

The back panel might be difficult to remove. Use a flat object to help pry it off, and don't be afraid to use force.