Another place to look is your drivers door jamb. Here's mine:
Just below the date code, you'll see the model - mine is a 2250SLEC. I'm not sure what the SSC prefix means, however. But what's important is those 4 numbers, and to some extent, the following letters.
For model specific diagrams of specific object such as the low point drains, visit the sticky at
https://www.forestriverforums.com/fo...on-234520.html .
I found a slightly incorrect version of mine, which is dated 1/27/2021 where I have a 2016 model:
as most of of do, there's two locations - the fresh water tank drain and low point drains. My low point drains are just aft of the side entrance door:
Your location will vary, again, depending on your model and year.