Ok, here we go... @BDA,
Had never really looked at the face of the knobs, (or even given it that much thought) so I went out & looked...
One is definitely not original, the other has a symbol of what looks like; to be best described as, the tube Mario jumped in at the end of each level in the Original Nintendo Mario Bros video game, with something spraying out of it...
Whether this depicts fuel or heat coming out of the "Mario tube" I haven't a clue...
If it helps it's on the passenger side... (71 S2 Federal).
The pic has a little glare on it but you get the idea...
Maybe JB will chime in again & enlighten us...
@Lotusjps, if you think this might work for you let me know, maybe we can work something out, as I don't care all that much if my cables are original or not...