is this a have to be?

[trashedxj 10+ year member]

dual batts, is in 100%have to run ground to ground or until i can afford the extra 1/0g can i just ground to chassis? and until i can get an extra fuse and holder can i just put one fuse near the main batt for a while? i mean as long as nothin gets cross wired or shorts out it should be ok right?

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[Got_Bass89 10+ year member]

You mean fuse at main bat and not before back battery? Not recommended but if there's never a short or anything you dont need any fuses... They're just there incase... And you don't really need another run for your ground.. Doesn't make a noticable difference. Just ground back battery to chassis and clean it good... Hope you did the Big 3 too.. Good Luck