wiring second battery negative...?

[Based]

So the way I put in my second batt is just grounded it to my chasis, I didn't run a wire from the front negative to the back negative. Do I need to?

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[NASTY08IMPALA 5,000+ posts]

So the way I put in my second batt is just grounded it to my chasis, I didn't run a wire from the front negative to the back negative. Do I need to?

Its not a must..it will be fine but dedicated grounds from the front help