There is a great online tool which takes a small download but is great to get a really good view of all the parts, especially when we don't what we have and where!
https://catalog3d.winnebagoind.com/menu/Parts.htm
This lets you "see through walls" to spot things without having to crawl around to look!
So I did a check and it looks like there are two different date builds on your year, make and model and I choice one at random but it shows tow filters, one a whole house near the wet bay and atool to remove it. The tool may be moved somewhere, so look for it if not on hand. Then there is a second filter for drinking water near the sink.
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Richard
Why no RV year, make and floorplan on MY signature as we suggest for others?
I currently DO NOT have one!