Looking good.
Here is my go at a neat install.
I dont know if people would be happy with running wires under the belts but its given no problems.
All wires are black.
Cell and motor ground travels across the car in between the cell cut outs.
I soldered to the bottom of the speedo lugs.
Cells are linked with an extra connector between the belts !!!
I was pleased with how neat it came out.