It's still likely (hopefully) a fuse. Fuses for slide outs and landing gear legs are usually near the batteries not in the converter panel. Look for a heavy wire that runs through a little box. It may be mounted to something, or may not be, just hanging in space on the wire. Likely to be a 30 amp auto type fuse, or might be a resettable circuit breaker.
Admin at www.openroadsradio.net
, part of the Social Knowledge network.
"RVing and Amateur Radio served up on the same plate"
2008 (or is it 2009?) Rockwood 8280SS - 2007 F-150
Lot's of mostly Kenwood radios