Battery in Trunk Wiring That Exceeds NHRA Requirements

Doesn't feed the fusebox. (I added) Gets switched power from it.
Factory charge wire is as you said.
Hot-switch on
Dead- switch off
"So my yellow wire is connected in the right places, but it's obviously too small. Why is it not hot (with key on)? With the key on, the right, small terminal on the CD is hot, but the right large terminal (where the yellow wire is) isn't."
This is my concern. The yellow wire in my picture goes to the charge stud. It will be made bigger. But it is connected in the right places at both ends, but is not hot. That's why the battery isn't charging.