Make sure that all the terminals of the unused connectors are properly tightened to avoid vibrations caused by sound.

An incorrectly made installation may compromise the device waterproofness. Water infiltration may damage the electronic part.

Make sure that all the holes are filled with some waterproof material – the top part, around the cables and the screws.

Use silicone or some other sealant to seal the box against an uneven wall. Thus, you prevent water leakage and wall damping.