I have been involved with the company that manufactures many of the restoration battery cables that the different vendors offer. We have built all of our cables off of assembly line pieces from documented samples. You cannot go off of the parts books for documenting the cables. You will find that the same part number will possibly interchange with numerous applications.
Most parts books used back in the day were updated at least two to four times during the first three to five years of the production year. During that time this battery cable may have been changed in some way in say length to work on a different application. They did not always change the part number and then on another situation, it would be superceded to a new number for a different application, even though the physical characteristics of the cable did not change. There is no set pattern to the logic.
We have added several C-Body positive and negative cable applications and will probably have them available by March of 2018.