Sure - the SSC-32 supplies 5V and ground to each servo connector (as well as the pulse signal). So if you wanted to drive an LED you could just connect the LED across the +5 and the Ground pins on any of the servo positions with a resister of about 180 - 220 ohms in series with either the + or - side of the LED. Since you have to provide about 5V for the servo motors across the VS1 and/or VS2 connector you could just connect the LED there as well.