I've read a few of the grounding threads here but none seem to specifically answer these two questions.
1. Is the indicated point in my engine bay the EA grounding point from the diagram?
2. If I put a power distribution center somewhere around grounding point BJ (see image below, basically where the tool cubby is in the back), is there any benefit to running a grounding wire all the way back to the engine bay instead of using BJ, as it relates to audio noise?
I plan to put a very small powered sub in the back, but I keep reading about interference/noise in the audio system from poor grounding. Someone recommended running a ground straight back to the battery to clean it up, but no one validated the recommendation.
The TLDR of question #2 is really, "are certain grounding points in our trucks superior to others when it comes to reducing audio system noise?"