How to get detailed schematics

I am trying to get detailed connections on my tank status monitor. What is the best way to find something like this? The panel manufacturer (Positron), is one incredibly elusive company who has no information that I can find anywhere.

What else does Heartland have to offer owners for more detailed description of their RVs except the super generic 92 page manual I found on their website that doesn't seem to have anything pertaining to my RV?


Thanks in advance for any and all guidance,
Mike
 
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