Quote Originally Posted by eurikain View Post
Thanks for the image :) I see what you mean.

Now, when you open the spindle cap, you just solder a wire from pin 4 to the spindle shield ? I mean, literally to the metallic shield right under the cap ?
Ok it depends if you have 3 or 4 pins on your spindle socket if you have 4 one of them may not be connected to anything. I took the end cap off and soldered a wire to the vacant pin and put a longer screw in the socket and attached the wire to a ring connector which then fitted over the longer screw and fastened it with a nut inside. Then you can use that pin as the earth in the plug. If you only have 3 pins in the socket then you have to attach the earth to the spindle or clamp.