There is a purple orb on the island with the red glowing things flying around, take that and insert it in the next orb holder. A path to the red orb will be there. Take the red orb and put it somewhere. For the next orb holder to activate you'll first need the purple orb again, you can get it back from the second orb holder by pressing e on it. Insert that into the next orb holder and take the red orb to the last orb holder.
Hope that helps.