Okay, here is the thing;
When you do this, you must know what you are doing, it is completely for you own risk; i pressume that you know how to solder, and you know about safety issues with high power electrics;
connect pin 14 to the ground
I used 6 of the ground wires and 6 of the 12V wires to connect to the chassis mounted connectors, show on this picture.
I also put a 10 ohm resistor (metal case, 20W) on the 12V line out, in order to give the powersupply a load when it hasn't got a load.. (bad for these kind of powersupplies)