Update: I called Freightliner and they confirmed that it is a 135 amp breaker that powers up the entire dash and ignition. I found one at Del City for about 2/3rds less than Freightliner or Napa. It will be here in about 3 days.
I do need to clarify one thing: There is a 6 gauge wire that comes directly from the battery to the circuit breaker, but there is "another" 6 gauge wire and a 16 gauge wire that connect to the aux side of the circuit breaker. I originally said that one side only had a 16 gauge wire attached, but indeed there was another 6 gauge cable also.
By the time I came in the house and posted my question(a few hours later)I didn't remember that there was a heavy gauge cables on each side. I only remembered the light weight wire on the one side. It only makes sense to have the same heavy cables on both sides, so I hope this clears up that question. Freightliner did tell me that the 16 gauge wire could go to any accessory that the coach builder needed a power source for.
Thanks again for all the helpful comments and suggestions.
