Back 20 years ago, the ability to change documents and incorporate the changes into a manual was not nearly as simple as it is today. That means, owners manuals were sort of generic for a model class. Sea Ray did publish wiring schematics for the boats, however.
Try this: Go to your local dealer and ask to see his copy of the "1994 Dealer Service Manual" covering the 440DA. If the dealer can find it, that manual should have a real schematic in it.
Also, this manual was not published for the general public and is not in Sea Rays's knowledge base, so a Sea Ray dealer is going to be your only resource for it.