Thank you for taking the time to write this. I know it will be greatly helpful to the other members.
Also, thanks for clarifying my instructions in the other thread. Apparently, the factory has chosen to color match the wires on the harness and inverters for these kits. This should prevent any possibility of confusion.
And finally, I thought I would add that it is possible to test the functionality of the bulbs/inverters by connecting the inverter directly to the battery (red = positive, brown = negative). However, your method is much more comprehensive as it also tests the functionality of the harness at the same time.