Has anyone deciphered or aware of a reference guide to identify the 2 letter codes on NOS throttle cables?

I ask because I have a throttle cable with "OA" on it and am unable to determine its application..

Thanks

 

I don't know the exact codes but I just measured three throttle cables I have here for '70-72 Cutlass/442 4 bbl motors and they measure at 23" laying the tape and arranging the cables the same way you did.

 

The one in my first post is much shorter at 21 1/2". I have no idea the application.

 

I'll check some others I have here...2 bbl cables