To prevent accidental electrical problems in your airplane, install all your wire leads as neatly as possible. Use 1-inch squares of stick-on Velcro stuck in place inside the airplane. Lay out your required wiring, making sure to leave a good amount of slack. Stick one-half of the Velcro fastener to the structure, and secure the wire to it with the other half. Velcro fastener is available at the hardware store in rolls of various lengths.