
Originally Posted by
Simon Barden
The clump of three wires is where the selector switch goes. The red wire here will be the main output wire, going to the output jack. The selector switch has one end with connections for the input and output signals, and the other end for a ground connection. At the signal end, the output wire is soldered to the middle two terminals (normally bent together so they meet), and the two outer terminals are for the signals from the volume pots. The soldered-together braided wires from those three cables is attached to the other end of the selector switch (a single thick lug). Obviously the braid doesn't want to touch any of the signal connections, so some electrical insulating tape round the braid will come in handy (ideally some heat shrink, but tape is better than nothing).
Some tape round the wires going to the selector switch will help keep them together and going where you want them to go.