you're best off not too add the lights to the fog lamp switch as you might want the fog lamps on only. not too sure about the 04's or where you're going to add them but if you're thinking of adding them to the bush/ bull bar you'll need to wire it. get a switch to add to the cluster under your clock as you should have a spare slot. as for the wires, get the wiring harness from the light manufacturer i think is your best bet. why KC's and not hellas? past experince is that hellas are far better than the KC's. but that's just my opinion
take care
sam
take care
sam