So I finally sat down to install a set of Bartolini 9W4J pickups that I bought about a year ago and I suddenly came down with a case of the stupids. One pickup is marked "L" and one is marked "S." What does that mean??? Which one goes where?? The best I've come up with is "Left" and "South" but I havent yet had enough beer to completely subscribe to that theory. Any help would be greatly appreciated (My soldering iron is cooling as we speak ).