Bought a box of these from Dixie Distributing when they went out of business. There was no part number on them so I looked through an Old Dixie Distributing catalog and you can see a picture of where I found it with that part number in the catalog. I then took that part number and found a couple other sites that had this and I took pictures as you can see in the listing. There were measurements in one of the other listings I compared the measurements to what I have and they are comparable. On one of the pictures which is in small print it says that these are for 1941 to 1965 FL models. 1941 to 1952 WL models. 1936 to 1940 El models. 

To be honest with you I'm not sure the exact function of this. It appears to be some sort of cable but the Dixie Distributing catalog calls it a control coil and plug. One of the other
 ones calls it a control wire and coil. 

Selling 1 per listing

Please note that although these are new they've been sitting in a warehouse for decades.