Zooming in on the drawing, it looks to be located above the outside TV?, or in an interior wall, maybe there's an access panel inside what looks like the bathroom.??... That's my guess anyway.
Good Luck
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2018 Sunstar 32YE
2 dogs, Max & Bitty
billyb, remove the 120VAC breaker panel and you will see it hanging on the wall to the right and back of the breaker panel.
Attached is a drawing from a 2011 32h, I'm sure it is in the same place.
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Grant & Pat
2014 Adventurer 35P
2021 Rapid Red 4dr Bronco OBX
If it's one of the old Parallax units consider replacing it with a IOTA or Progressive Dynamics converter. The stock Parallax doesn't properly charge batteries.
__________________ Chris & Sherry Brown - 2005 Itasca Sunrise 31W - W20 and 8.1
2015 Chevy Colorado 4X4 Toad
2021 Chevy Spark Toad