Restricted to the Anderson Connectors in the Kit?

[BrianBSL]

Originally Posted by Al Skierkiewicz

Here is the way I interpret this rule...
<R48> The ES-18-12 Battery, the Main 120 Amp Circuit Breaker, and the IFI CB/Distribution panel must be connected as shown in the diagram. The ES-18-12 Battery must use the Anderson Connector and the copper SLU-70 lugs provided in the Terminal Supply Bag. The Battery terminals and the SLU-70 lugs must be insulated with shrink tubing and/or electrical tape. You may use additional lengths of #6 red and #6 black wire to reach the panel as needed to make the above connections. The circuit breaker must be readily accessible for inspection and testing at each competition event.

The #6 and the red Anderson connector provided must be used. Elsewhere in the rules, wire minimum sizes are specified, but no additional reference is made to #6. Simple answer is use what is provided. The tradeoff for lower resistance/higher weight is not significant to warrant the change. (The wire length should be too short to matter.)
I would like to know what "high quality" #6 wire is?

I originally interpreted the rule the same way you did, but for the heck of it asked on the Q&A, and their answer sort of surprised me:
ID: 1167 Section: 5.3.5 Status: Answered Date Answered: 1/17/2005
Q: In reference to rule R48, can we use wire larger than #6 (such as #4) diameter between the battery and the Anderson connector and between the Anderson and the breaker panel?
A: Yes

Specifically that I said on the battery side also. On the other hand, the Anderson's are only designed for 6 gauge, not for 4. Tomorrow I'm going to try using some 4 gauge with some extra contacts I have.

Edit: Fixed spelling, stupid 8 AM classes.