I dont have any more pictures, this was taken from Gravitymaster's guide on SMOS.
Nevertheless the numbers written physically on motherboards dont even match their real physical connection numbers.
Bigburci, as I said before, you simply connect usb keyboard and do it straight on the rig. You can always play with fan settings for that one card, but from my practice it will be hard to determine the card in a forest of noise, the temperature drops to room temp in a matter of 2-3 minutes and is easiest way so far.
Just disable the gpus from 0 to x, where x ur number of gpus one by one and touching them once they cool off and sticky a note beside with their number, so you will know later on. It cant be any simpler...