I'd love to see a picture of this if anyone has done it.
I didn't take any pictures of it and, since it is working, I don't want to temp fate and open it up. The locomotive is an MTH Railking steamer. In this locomotive the ground and roller have screws to hold the leads to the electronics. I trimmed the TVS leads to fit and curled them around the screws. All insulated, GRJ, so that Murphy doesn't come to visit.