Different ends or connectors if you will are up to user preference, hence why batteries are produced with different connectors. There are all sorts of pros and cons for each connector type out there.
If you are looking for some new hook ups for batteries I recommend either
Prairie battery
http://www.prairiebattery.ca/MAIN.htm
or
Cheap battery packs
http://www.cheapbatterypacks.com/ind...orwarded=true&
Both are excellent retailers and can custom create packs to your needs.