Attach the four rotary encoders with M2.5 screws and nuts to the cutouts at the bottom of the lid.

Attach the four alphanumeric displays with M2 screws and nuts to the center cutouts in the lid.

Attach the menu rotary encoder to the top encoder cutout on the lid with M2.5 screws and nuts. Attach the 8x8 matrix and menu alphanumeric display to the top cutouts on the lids with M2 screws and nuts.

Secure the Feather and I2S amp to the standoffs in the case with M2.5 screws.

Cut and splice the speaker wires to prepare them for the I2S amp terminal block.

Mount the speaker with M2.5 screws and nuts into the mounting hole in the back of the case.

Secure the black speaker wire into the negative (-) terminal in the terminal block on the I2S amp. Secure the red speaker wire into the positive (+) terminal block on the I2S amp.

Insert and mount the USB-C extension into the mounting hole on the side of the case. Plug the cable into the USB-C port on the Feather.

Plug a STEMMA QT cable into the STEMMA port on the Feather.

Plug the other end of the Feather STEMMA QT cable into the open port on the lower right rotary encoder.

Attach the lid to the case with M3 screws in the corner mounting holes.