3 Batteries... does it matter how I wire my quad (+) and (-) inputs on amp?

[moh.vze.com]

Meh. I'm about to add my dual 1/0 inputs to the DC5K amp (this means 2 more positive and 2 more negative runs to the battery for a total of 4 positive and 4 negative runs).

Current setup:

Under hood Battery ==> wired parallel to Trunk Battery #2
DC5K ==> Trunk Battery #2
Trunk Battery #2 wired parallel to ==> Trunk Battery #3

Now if I were to add my dual inputs on the DC5K (I'd have two extra runs of positive and negatives going to A battery).

Should I keep it consistent and connect it to battery #2 or should I connect the new dual runs from amp to battery #3?

If a Mechanic were to work on my car, should I disconnect all the negative terminals in my trunk batteries so that he would just have to disconnect the front battery negative?

Is there an easy way to hook up my trunk batteries so that I just have to disconnect the negative wire run from Hood Batt to Rear battery? I feel like the wiring is very simple and I'm just overthinking
 

[moh.vze.com]

Meh I guess my main question is:
Does all of the negative terminals on all three batteries inside my car need to be disconnected for a mechanic to safely work on my car.
 

Thanks!

[boomintahoe]

I would. If he's doing any electrical type work. Seen/read too many stories about people getting their vehicle back and noticed things wrong with their car audio system. I would let him know about it. Something like hey I have a high dollar stereo and just a heads up for ya.

[reedal]

Yes. All battery negatives have to be removed in order to negate the circuit.

[moh.vze.com]

Got it.

Hmm. There has to be a better alternative to electrical taping each and every single wire lug when I disconnect my negative wires.

[reedal]

A single terminal that can be removed without disconnecting the other cables.

[White Lightning]

Circuit Breaker(s)

[06RTCharger]

What about using fuseblocks as ur breaker? Fuse all ur 1/0 negative with on of those smd multi fuse distro blocks. Then when u got to take in ur car to service u can pull all the fuses from that one block. I think that might work? I think the biggest circuit breaker ive seen is 80A. There probably are some bigger tho, just gotta look around. I think having it all in one distro block would make it sorta simple, instead of having a bunch of breakers to mount everywhere.