My kids received a Lionel Train set last year for Christmas. We just moved and got it out again. I noticed a black plate that has 3 wire terminals. It appears to be some type of pressure/weight contact device. One end has a screw with a spring that allows me to adjust the spring tension. We are wondering where this piece is used and how to connect it?? It does not have a part number on it, only "Lionel". I have searched and searched with no success. It is O guage.
Thanks
Joe
Thanks
Joe