What style of alternator do you have? 2G, 3G?
Since you noted a cable, it should be a 3G+. I'd suggest taking a picture of your engine bay (the alt cable) and posting it. There had to be a reason for the cable being disconnected. Perhaps one pairs of the keen eyes on here can spot something. Be VERY SURE the charge cable is fused appropriately before reconnecting the cable.
Good luck.