Note the back of the sewing machine that shows the electrical connections. The plugs are called Chicago connectors I believe. Someone else on the QB may have more information about them as I don't think they are made or used anymore. I have a Damascus with the same connections and original foot controller. I am going to ask my OSMG if it can be re-wired with modern electrical parts. I would pass on the that machine if it did not have the foot controller.