9: Install case top
Route the two cables from the printer (power and serial) down through the middle of the box.
On one side of the case, loosen the two lower screws just a couple of turns. Then loosen, but do
not completely remove, the two upper screws on the same side. The tip of the screw should be
flush with the face of the nut. The side piece can then pivot upward slightly.
On the opposite side of the case, insert the top piece into the two alignment slots.
Pivot the loose side piece upward, press the case top into place, then re-tighten the four side
screws (finger-tight is sufficient for now).
