A quick way would be to select some vertices and scale them down. You would have to select the ones positioned like a circle if you know what I mean. Do this all the way around the wire. I doubt there's anything else most of us at SM could tell you without having the actual mel script. If it's anything like a torus though, you might be able to find a "section radius" under the inputs section of the channel box. Decrease this value to make it smaller.