Looking for a complete disassembly of the new Acer Switch 3 12.1" Tablet / Convertible. Especially interested in: (1) Open...

Well I think I figured it out now: The 2 headphones are connected in series (white cable) and the mic is connected separately (black cable). Both black and white cable are connected to the headphone input jack. I call the headphone piece in your image the left piece. The connectors on the left headphone piece I call 1 to 3 from left to right: 1.) Left headphone V+ 2.) GND 3.) Right headphone V+ (it's just soldered there to hold it in place, it's not actually connected to left headphone) The wiring to the jack is exactly as on the photograph of @jayeff