wire set up

i want to setup a computer fan running from the electric socket.
bought a 240 converter to give me 12v to run fan asked the guy in the shop how to wire it up he said just chop all 3 wires solder a dc powerline socket to it and plug it in and it will work but it dont help please
im trying to build a febreeze conditioner for my room added pic

check the DIY sub-section of the general marijuana forum. There are a few very helpful threads on wiring PC fans.