This is a replacement "wishbone" to hold the speaker as the top part of mine broke, this model is a bit sloppy but works well. There is a steel C clip on the original part you will need it to hold this to the headband same as the original. You also need to trim off two small tabs inside the headphone as i couldn't be bothered modeling and they dont really do anything. You will figue out which ones when screwing everything back together as they are on the sepaker and stop it from being screwed back to the case.

Have added the step file now if anyone is keen to remix and tidy it up a bit!