This may help some connect your batteries together without special tools or having to run and get wires cut and crimped.
You can buy these at Home Depot or Lowes, but I believe Home Depot you get two in the package for the price of Lowes package of one.
Easy to connect multi battery cables to one terminal and you can cut your wire as short as needed.
Hope this helps
Mike
Another shot.
This clamp allows me to connect two heavy gauge to my bigger inverter
Mike, is that last one tinned copper or Aluminum?
aluminum, if my memory serves me without finding the package this is the ones I purchased. I believe they are rated for 150amps
http://www.homedepot.com/p/Blackburn-Type-ADR-2-Conductor-1-Hole-Mount-Wire-Connectors-for-1-0-Stranded-Max-Wire-2-Pack-ADR11-21-B2-5/100172941
The copper ones I believe were these. They are rated for 200amps
http://www.homedepot.com/p/Blackburn-3-0-Stranded-to-4-Stranded-Type-BC-Single-Conductor-1-Hole-Mount-Wire-Connectors-2-Pack-BTC3104-B2-5/100183915
Mike