I purchased heavy duty battery cables from a local store, these were terminated at both ends. I used to work in a parts store and while we didn't stock these they are in the catalog. These do not have that extra wire with the female butt connector that is hardly evern needed or used. I can't remember the wire gauge, but is was at least two sizes over the standard cables. These were made by KEM and only come in one coloer, black, which I wanted anyway.
I also looked at getting these type of terminals,
http://www.mcmaster.com/ctlg/DisplC...nWidth=804&ToolsetID=ToolPageFlip&ToolsetAct= scroll down a little and look at the "M" type ends. No crimping or soldering needed, and they are HEAVY DUTY.