I am trying to plan out my build so that I can place things and make my wiring but I have a few questions about a few things. I have a 1/0 run of power from my front going back to 2 extra batteries. I will be upgrading my big 3 4g with all 1/0 wires. In the back of my trailblazer will be the extra batteries. Now, I will just run the main power wire to the first battery then run a short wire to the + on the second battery, correct? And as far as the ground.. I'm sure it would be best to ground both batteries off to the frame... Should I run a short wire between the 2 -'s on both the extra batteries as well? And I'm also assuming that along with the fuse after the battery up front, there should be a fuse between the two battery +'s and one between the second battery and the amp? My Fi BTL 15 will be here this week and I have a hifonics 2000w XX-HERCULES for now but plan to upgrade to a 3000w amp and add a 400w amp for the mids and highs and I don't like doing things more than once. A new alternator will be first though... Does it sound like I have the wiring right or am I missing something or have something I shouldn't? Thanks for any help in advance!!!!!!!

That would be correct for wiring in parallel.