Connect servo cable.

On a Makelangelo 5, place the servo cable over the left hand motor. On a HUGE, place it over the right hand motor. This makes sure the cable doesn't touch the pen while drawing.

Make sure the BLACK wire of the extension cable matches the RED wire of the servo.

Connect the USB cable for your first run. Remember: The "top" side of a USB connector always has the USB logo.

Start drawing!