If your trailer has a 30 amp power system, the converter is built into the bottom of the breaker panel. If you have a 50 amp system, the converter is behind the breaker panel in the space under the refrigerator. It is a separate unit, and is usually held in place with screws into the floor.
Steve & Chris Fitzgerald
2014 Rockwood Signature Ultralite 8280WS
2006 Ram 2500 w/Cummins 5.9