Coax-Optical Instructions
Interior Overview
Circuit Board Underside
Power Supply Wiring
Case Underside
Case Switch & Power Jack

  • As you can see, the hole for the TOSlink transmitter is rather poorly done - there's only so much accuracy one can squeeze from a soldering iron. :)
  • If you're looking for a cleaner cut, you can also try a nibbling tool.
  • In the end, I decided not to redo the cut because plugging in the TOSlink cable conveniently covers the cavity edges and then some.