I've never seen a plaque like that before on any of the boats that I've ever owned or operated. Just about all boats are likely going to be wired slightly different from one another depending on the manufacturer, how many outboards they have, batteries, accessories and so forth that you have as well. I imagine your boat is like mine where you've got two batteries, of which when I bought my boat, the GW dealership that I bought it from had the maintenance tech go out with me for the sea trial run and went over everything I needed to know for the boat. On my particular boat, it's got a standard battery switch of OFF being in the 6 o'clock position, 1 and 2 being in the 3/9 o'clock positions and it's either "Both" or "All" at the 12 o'clock position. He said obviously to turn the switch to the off position when not being in use, but to just put it and leave it in the "Both" or "All" 12 o'clock position whenever running or operating the boat. I imagine something like that would be hard to find and you'd have to have one made up, which shouldn't be too terribly difficult as you can do custom stuff like that on Etsy or other websites. But I guess my question would be why bother? For smaller boats like ours with only two batteries, I wouldn't think it's necessary to have something like that.
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