Yet from looking at a MAD drawing and the way wires have been run the process was started but not finished.
Think that I am just going to have to make new harness for the engine side and complete the MAD conversion.
Well you might have to do something along those lines depending on what you find.
I hope you can put it back to stock configuration. The MAD scheme is very general and has its own design faults. I guess it brings them business as it certainly gets a lot of internet attention.
If the ammeter's terminals are OK, its probably good to go.
My question is why the alternator power disconnected at the bulkhead. It may be because that connector got damaged. That is the connection that sees the largest currents. The Previous owner/mechanic may not have seen the Mad scheme, but simply been looking for another route to get power fed in.