I've got two orion 2500Ds , an 8004, a second battery and four 1.5F caps to go in the trunk. I need help deciding what fuses and wiring to use between the front and rear battery, the rear battery to the distrobution block, from the block to the caps and from the caps to the amps.The 2500Ds have two #4 power terminals and two #4 ground terminals and the 8004 only has one of each. Also, what size wire should I use for the "magic three"? I haven't hooked this much stuff up before so I'm kinda lost. Ant help will be appreciated.

the big 3 use at least 0 gauge wire
as far as the fuses i would go with 250a all around but thats just me ask some of teh more knowledgable people around like n8ball, sndsgood, wsyiwgyi, ect....