Insert each MIDI connector, from the outside and secure them with the bolt from the inside. Use a wrench for tightening the bolts.
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There are 3 standard MIDI connectors (DIN-5) mounted with their harnesses.
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Insert each MIDI connector in the 3 holes labeled as ''MIDI OUT/THRU/IN''. You have to insert them from the outside and secure them with the nut from the inside. Start from the ''MIDI-OUT'' and end with the ''MIDI-IN'', using a wrench for tightening the nuts.