I bought "basket case" AHM/Rivarossi Big Boy last week. It is an early model with large flanges and a large round "Can" motor in the cab. It has the silver smoke box and firebox and is numbered 4013. My best guess is that it is from the late 1970's or early 1980's. I got it all back togther and it runs very well, but I have two wire "thingy's" left over and I don't know where they go. I also have an older "square" motor version that is noiser and runs faster. But it doesn't have these wire things. Any ideas?