Looking for location of any secret breakers on Carver 3007 - 2 primary panels show no signs of scorching post scenario below;

in the midst of hunting down why generator wasn't pulling water I started Generator without shutting down main breaker and also didn't disconnect shore power at point of starting generator. At which point panels tripped. A couple of small receptacle items on port side would come up but at moment of switching on range that load tripped whole system and starboard side never came up. All outside power and lines accessed and operational.