Ammeter Battery overcharge

OK also notice the upper drawing bulkhead terminals key location, a V shape shown opposite 'B' and 'C'.
Lower drawing same V shape shown opposite X and Y. One or both drawings wrong ?
This could be the root of aftermarket screw ups too. Who knows what info they followed.
Some of what I stated earlier was incorrect. I just went and looked at both unmodified OEM 67 Barracuda bulkhead connections. That V key is to the inboard side or toward middle of car. Port Z is on that inboard lower corner and the fusible link is there.
Also... a heavy gauge red wire is attached to a black fusible link w/yellow tag in port Z. So engineer should have labeled A1 as a red wire ( 12R ).