Remove the T8 Torx screwdriver head and replace it with the 60 mm extension; then, add the T9 Torx head.

Loosen, but do not remove the two screws at the bottom of the 1.2-inch wide gap in the middle of the internal structure.

These screws are spring-loaded and will stay in the device, even when loosened; however, it is still possible for them to be fully removed. Be careful to only partially loosen them.