I getting ready to rewire my headlights with relays and bigger wires supplied by the battery. I'm starting to get quite a few wires coming from/to the batteries...connection for a trickle charger...100a cable to the cabin to power an inverter, 20a cables for off road lights, so, I was thinking about replacing the moulded lead battery terminals with marine style terminals and soldering on 3/8" 1/0 lugs to the battery/starter/alternator cables to facilitate all the cables I'm getting into. I can't find anywhere info on the current carrying capacity of marine style terminals [battery lug to 3/8-16 post with a wing nut] Anyway, has anyone done something like this and is it safe?

 

I like using the military style. Similar to these. Pico 0810PT Military Style Top Post Battery Terminal 1 Set Positive and Negative per Package:Amazon:Automotive
You can just solder lugs on all your wires and bolt them on.

 

go to your local stero shop and get a power block that you could add multiple line into