When it's done, you have to solder the 2 LED wires (red/black) with the 2 spare wires on the MIDI JST harness (white/yellow). Polarity is important, so don't cross the wires: | When it's done, you have to solder the 2 LED wires (red/black) with the 2 spare wires on the MIDI JST harness (white/yellow). Polarity is important, so don't cross the wires: |