Second Battery and Amp Grounding

[HomeLite 10+ year member]

I'm putting in a second battery into my trunk. Would it be better for the amps to have separate grounding points on the chassis, battery and amps grounded to the same point on the chassis, or the amps connected directly to the negative terminal of the second battery and then grounded to the chassis? Thanks y'all

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[Popwarhomie 5,000+ posts]

I’ve always connected my amp grounds to my batteries.

 

[Mayhem]

I’ve always connected my amp grounds to my batteries.