Lego Nxt working with no batteries

Step 3 Final Stretch

Alright the wires should be sticking out of the screw hole closest to the usb port. Now stretch out the wires to go to the two battery ports on the edge of the board. The terminal on the left is + and the terminal on the right is -. Now keep in mind you have to solder the diode (Thank you LasVegas) to the positive wire. The diode has a indicator to show which way you want the power to go. You want the indicator pointing towards the battery terminal. After soldering I electrical taped where the wire met the diode. I next laid them out and cut to where the end of the diode met the battery terminal. The solder on the battery points are thick but if you are patient and let the solder melt. The diode will have no problem plying itself.