Thanks. I'm filling up my cart there. Trying to get everything I might need.Found it! Another source for a quality trunk mount battery cable.
What he said..It should be about 5/8" in diameter. While thick, its also very flexible, as it should be. It's a high count, narrow strand cable not a cheap welding type. Also double insulated so it doesn't require extra protection other than when passing through sheetmetal (use grommets) or if it routes close to exhaust. It will fit neatly in the door sill raceway too. Best part is you can crank until you kill the battery and never worry about it overheating and causing a fire.