Call them
Kelly,
Give them a call. It is a small shop in Clayton, GA and the owner has been working on vintage refrigerators forever. I bet if you tell them what you are working on, he'll be able to tell you exactly how to wire in the relay. Probably can even tell you the compressor size in question and the pin-out of the 3 electrical connections of the compressor or wire color if permanently soldered on. He helped me with my 1955 Frigidaire needing the very same part and basically told me the colors of the wires coming out from the compressor and how to wire in the new one he sold me. A new vintage Frigidaire relay I saw a few years back on flea-bay, but they wanted like $70 for it. Would have been nice to get that OEM relay but since it is so well hidden, I can live with the after-market one. But a universal after-market door gasket that doesn't look like the original, NO WAY!! lol