WARNING: CHANGE GUI.YML, PLEASE REMOVE IT BEFORE UPDATING THE PLUGIN.
Tips: If you have translated the gui.yml, you can simply add these 3 sections to it. Place it where ever you want.
Code (YAML):
# Leave these empty if you don't want sound. open-sound: "BLOCK_CHEST_OPEN" close-sound: "BLOCK_CHEST_CLOSE" click-sound: "BLOCK_WOODEN_BUTTON_CLICK_OFF"