grounding?

[loopkiller 10+ year member]

Ok I drew up a quick illustration of what Im thinking I have to do.. Tell me if this is corrrect.

You see how I have a total of 4 grounds from the amps?

Do I need to put 4 grounds off the rear batteries as well or just 2?

That looks fine to me, other than the Paint level graphics //content.invisioncic.com/y282845/emoticons/tongue.gif.6130eb82179565f6db8d26d6001dcd24.gif