1 x Sony WH-1000XM5 Headband Assembly 16-Pin Main Wire Connector. You can always send your broken Sony headphones to our repair center by starting a repair request online.
Repeating the right side of my headphones worked. Only issue I had was that the connecting wires were too short I had to reuse the old wires from the broken speaker driver. This item already requires that you have some soldering equipment so it wasn’t a complete deal breaker. Otherwise if your old speaker driver has broken wires it might be a problem.