I Googled "Tin Lizzie quilting machine cables" and came up with these photos:
https://www.google.com/search?q=tin+...machine+cables
Perhaps one of them will help you?
Also, I recommend joining one or more of the Tin Lizzie groups on Yahoo. Here is a link to the largest group:
https://groups.yahoo.com/neo/groups/...ieLongarm/info