The restart button has a wire so it can be used, not for the LED. I have never had a LED on a restart button, only the Power, HDD and power button.
As for the HDD LED, make sure you have the polarity correct. I think that one can be put on backwards. The Corsair cases have all black cables and if you put it on backwards it is hard to tell. So try flipping it around and see if it starts working then.