I had to replace the cable due to damage from trying to reinsert it at the logic board and I found it best to re-attach it exactly the way that thewiseone71 describes it above. If you disconnect the part at the top with the tape around it, this goes much easier and there is less of a chance of damaging the port on the logic board where it attaches at the other end. I think some photos of this port, and the way this cable goes back in would be a great addition to this tutorial. Replacing this cable would also make a great tutorial.