7) Remove the 2 rubber caps [1] and the 2 screws found on the upper right cover.
8) Attach the speaker unit (lower) [1] to the upper right cover of the machine using 2 screws (binding; M4x40) [2].
9) Mount the speaker unit (upper) [1] to the speaker unit (lower) you have mounted in step 8); then, secure it in place from below with a screw (binding; M4x6) [2].