Frank - When LED's are fitted to a bass or guitar, they are mounted in a separate wood strip that is inlaid into the side of the fingerboard. Look again, there is a strip of wood on the side of the fingerboard that is not the same as the fingerboard. I would think that this is for LED's. I have a couple of basses with side LED's and they do not have a toggle switch. Sometimes I think I could use a dimmer knob though.--- Michael
