How to replace old Lego 9V cables with broken insulation and open a Mindstorms RCX light sensor.

In the video I show how to open an old Lego 9V connector and also the RCX light sensor and replace the cables. In case of the sensor, the new cable does not really matter. In case of a cable for motors, I use a 0.34mm2 silicon cable which has a similar low resistance but is slightly bigger.