Slide the servo motor into the servo motor slot on top of the 3D printed stand. Make sure to pass its wires through the cut-out on the side. Secure it with two M2 screws.
Plug the STEMMA speaker into the MatrixPortal M4's onboard JST socket with the elongated 3-pin JST cable. This will connect the speaker to pin A0.
Attach the RGB matrix's power cable and the JST 3-pin socket cable's power pin to 5V on the MatrixPortal M4 by securing them with an M3 screw.
Attach the RGB matrix's ground cable to the MatrixPortal M4 with an M3 screw.
Plug the matrix power cable into the back of the matrix.
Super glue the servo horn to the 3D printed chocolate coin cup. Then, attach the servo horn to the servo motor.