Parts List:

• Electric Brick 2 x 2 x 2/3 with Wire End (2)
• Plate 1 x 2 (8)
• Plate 1 x 4 (4)
• Plate 2 x 2 (4)

Notes:

• Piece clarification:
•     Electric Brick 2 x 2 x 2/3 with Wire End: This is one end of one of the wires that came with your Mindstorms set.  Connect the wire in the same direction as shown in the graphic.  It's up to you to figure out how to run the wires in the end, though.  (See the section on wiring above the instruction links on the main page when you're done, if you didn't read it already)