Step #3: Test fit the new brain and spinal cord
Here is a close up of the final wiring, with labels. I had test fit everything on wood, because it's super easy to make panel modifications to. For the final product, I transferred everything to a 1/4 inch thick UHMW poly sheet.
Step #4: Install the new nervous system
Here is the test fit of the panel. It's longer and deeper than factory, but that's the price you pay for glory
Now, it doesn't exactly matter how big it is or how much stuff it blocks, because...it's 100% removable. Since I had to splice about 52 wires anyways, I had 2 options...butt connectors everywhere, or actual muti-pin connectors. It's the same work, the same number of fittings, but it makes everything removable.
Step #5: Slap the patient awake and test their cognitive skills...
Fully connected. Working on testing individual circuits, etc. 2 hours later, I drove the car out of the garage with a new brain.
I never took a final complete picture, so you'll have to wait on that.