The main breaker will be in the power distribution panel. One side will be the AC (shore or generator) and the other side will be the DC side.
AC side will have breakers and most likely the first one on either end will be a 30A breaker with a label under it marked “main”.
2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.