Legacy Wires? 83 KZ550

I have two wires in the battery area that are just there. They do not have the same male/female to connect to each other and they are pretty beefy and appear to be stock. Any idea on what they are for? Thanks, Brendan

The white/black wire might be a pos (+) accessory lead from the accessory fuse box.
The black/yellow would be a accessory ground wire, but I don't know if that's stock.
The acc ground on my 81 650 is connected at the neg (-) battery terminal.
Also, there are probably a couple of acc leads at the headlight bucket. blue/white pos (+) & black/yellow ground. the blue/white wire is from the same fuse box as the white/black pos (+) acc & each has a 10A fuse.

Both are wrapped up in the same loom and tape as the other wires and look to be somewhat stock. I will throw a volt meter on them tomorrow. Thanks, Brendan