Optmia Red Top 1050 Amps / 830 Cold Cranking amps. The Green wire is a 1.0 to Chassis ground. 4 ga. to amps via a 100A Circuit Breaker .
Shur Power 130 Amp Dual Battery Isolator. Above it is the 80 Amp Platinum Wafer Fuse to the Battery.
100 Amp Circuit Beraker on Fire Wall to Distribution Block.
Gold Maxi Blade Fused Distribution Block, Shown with cover removed.