Is there a wire somewhere that is 48v+ and is switched with the key?

[ATrain]

So I finally (last week) found the switched wire (48v). Buried between two batteries I found two white wires joined together with a female butt connector, but no male connected to anything (see pic below). I hate leaving threads without a resolution too.

I had dismissed it earlier as more random, disconnected wire, which exists all over this cart.

I only need to power a tiny stereo and cart lights, so it should be OK to carry the load without getting a 48v relay just using the switch line I'd think.

Where would these wires lineup against the schematic? It doesn't appear to go to pin #1 or #12, only because I tested those directly for 48v and didn't seem to get the same reading that these get.