Here are the instructions in photos.
Pull the cotton back to revel the wire. Notice the red color due to the enamel coating
Cut a small section of the rectangular poly core out
Round the cut so as to leave no sharp edges
The wire should now look like this
Apply flux to the bare wire
You need a hot solder iron +500f to burn the red enamel, notice the wire is now copper colored
Add solder to the wire and be sure to burn off any residue
Cut a very small amount of the insulation from the ground wire
You only want a little bit of wire exposed
I use a 25w iron to work on the plugs
and a 60w iron to burn the enamel coating
Plug the ETI connector into your throwaway player be sure to do it this way as the shell holds the delicate ground pin tight
Remove the shell to revel the wire points
Add solder to signal and ground pins
Now solder your pre-tinned wire to your tinned signal pins. You want to go quick but give it enough heat to fully melt together
It should look good
Solder the pre-tinned ground wire to the pre-tinned ground pin
It should look nice and clean
Side note, this is how you get consistent cuts of tubing material
Now get your hot glue gun out. Notice the solder pot in the background. Also an excellent way to tin wires
Add hot glue to the joints. Be sure to cover any shorting possibilities
Slide the flex wrap down to the connector
Slide the shrink tubing onto the flex wrap. This is easier if you start with the flex tubing longer than the wires
Use heat gun to shrink the tubing. Be sure not to melt the flex wrap
It should look like this
Attach the shell and screw tight
Secure the shell with hot glue. A special hot glue gun helps a lot here!!!
Action Shot
Ok 1 down three to go!!!
Your done