chasnnm3-
First off, welcome to iRV2!
Second, you should add a "signature" to your profile. It contains whatever info you want; most people put info about their coach there, so they don't have to type it into each message. Instructions for adding a signature are
here.
If you follow the link "Skip426" gave, down to the "Body, 12V Wiring Installation" diagram, sheet 3, you'll see the converter is under the refrigerator.
It was common for Winnebago to install converters under refrigerators.