Wires & Lights
Locate the gray circles and rectangles on your plane template. Remove the backing on a piece of copper tape and place the tape over one gray rectangle (so a portion extends into the circle, as pictured).
Caution: Try not to rip or crinkle your tape; you want one strip of tape per side.
Repeat the previous step with the other gray rectangle.
You now have two strips of copper tape that parallel each other and begin on either side of the plane. These act as wires.
Image in the Public Domain
Look at your LED:
One lead wire is shorter than the other.
The ridge at the bottom of the bulb has a flat spot above one lead wire (see image).
Each of these conditions identifies the negative lead (cathode).
LEDs work when their positive lead is connected to the wire from the positive side of a power source and their negative lead is connected to the wire from the negative side of the power source. Determine which piece of copper tape will connect the positive (anode) LED lead.
Gently bend the LED lead wires so they can touch both pieces of copper tape on your plane.
Secure each lead to the copper tape wires with a piece of transparent tape.
The finished product should look like this image.