Awesome Brian,
I guessed as much with the cable lengths and clips that attached to the tank holding screws, but wasn't 100%. I can see where it comes through so will be able to judge pretty close. I see from the underside the first plastic clip fixing as well so this is great.
On the harness that feeds the rear lights, side markers and number plate light do you have a shot of where the clips go to hold the harness? The car had some repairs done here but nothing major so I would have expected to find these also? I had a look at a friends 69 Convertible and his were attached to the tail light framing?

Thanks for the photos Brian, it looks like an original car?