I used the stock cable. I'm not entirely sure how everything is wired up with the stock cable.
There are 4 wires
Red - right
Black - left
white - It doesn't seem like this is connected to anything, testing the resistance between this and the left, right, and shielding shows it's open.
Shielding - common ground
The L/R/Ground wires seem properly isolated. I used very little solder to ensure there isn't extra that might create a short. I placed heatshrink over...