Originally Posted by ^Mike^
I wouldn't do it, my guess is the plastic casings that surround the wire could melt and short your system out probably damaging the whole thing depending on what wire.
Well, I don't all agree here.
You can wire it under the board, but for one, you will need to put the wires in place before the board. You should avoid the CPU part, if it heats a high temps...but, as it's plastic, if it would melt the wires, the heastsink's plastic would be the same...but, to be safe, just don't wire it under the CPU.
Next, you might not have enough wiring for it to go long enough to the drives. If it does, then good. If you think for shorting, plastic is an insulator, so it's not shorting.