Alternator wiring

Agree that's not how it was originally done.
But it could be routed that way. It doesn't matter as long as its connected well.
The blue dot represents the spliced connection, which could have had a couple more wires but they are not important for your question.
View attachment 1715298085

If this is what was done, it will work the same. (as long as the connections are good and the wires not too long)
View attachment 1715298100
I get the feeling pic number 2 is what I'm dealing with. I got the car in 2008 and all this was done already.
I'd like to know for sure but don't want to hack in to my harness. It's all still fairly tidy.

How do guys convert to 1 wire alternators?