What are you building? The wires are marked up on the layout, and it goes hand in hand with the offboard wiring in the first image here
http://tagboardeffects.blogspot.co.uk/2012/02/offboard-wiring.htmlThe resistor for the LED is sometimes included on the board, so if you see a wire marked LED+ from the board then you know you don't have to add one offboard as shown in that layout.