I'm putting together a new system described below. My problem Is that there seems to be nothing labeled PWR-LED coming out of my case, and I forgot to notice the old setup before I removed my old board. The other leads all have their mate (hd led, reset, power sw, speaker), leaving ONE unnamed green positive and ONE unnamed white negative which I suppose should go to the PWR-LED on my new motherboard, but my new board has THREE pins, 2 positive and 1 negative that are labeled PWR-LED. Do I need an adapter?