My fuse panel is inside the trailer converter panel. Mine is actually a WFCO 8900 series Power distribution panel.
It looks like this on the inside...
Google image..
Mine has one main full size breaker and several half height breakers for the 120VAC side.. Then on the 12V DC fuse side is ELEVEN ATC size fuses for the 12VDC circuits. It also has two ATC fuse off set for the REVERSE POLARITY battery protection...
The trailer converter is in the bottom compartment. I abandoned in place the WF8945 45Amp converter/charger unit for a stand-alone PD9260C converter/charger unit which was installed closer to the battery bank. MY setup has additional batteries installed and I needed a better smart mode charging system being Progressive Dynamics model PD9260C 60AMP setup...
Roy Ken