yhh i worked it out, i did think at first it went there but as it had 3 prongs not 4 i was confused lol. damn those ps3 controllers are fiddly... took ages to get the trigger buttons and that plastic piece that goes inbetween them all in place and get the casing to fit together. well atleast i got rid of those random pieces of plastic in there that were making a rattling noise.
thanks for the help guys btw,
now to go back to black ops...
ahhh...