This key might be helpful to identify the terminals on your alternators, as you can see the same function can have different designations depending on the make and model of alternator

Terminal	Definition	Notes
A	Battery	Battery positive connection
B	Battery	Battery positive connection
B+	Battery	Battery positive connection
C	Center	Centre point of a Y stator
COM	Conputer	Computer Connection
D+	Warning light	Comes from the old ‘Dynamo Positive’ on a generator
DFM	Dynamo Field Modulation	Duty Cycle signal from the ECU
E	Warning light	Comes from the word ‘Excitation’
F	Field	For externally regulated alternators
FR	Field Regulation	Voltage Signal from the ECU
G	Ground	Chassis negative connection
I	Inidcator	Warning Lamp
L	Lamp	Warning Lamp
M	Field	Found on older Externally Regulated units
N	Neutral	Centre point of a Y-connected stator
P	Pulse	Stator connection for tachometer
R	Relay	Output to charge relays, etc
S	Sense	Battery Voltage sense wire
S (FORD)	Stator	Stator Pulse. Used for tachometers
T	Tach	Stator Pulse. Used for tachometers
W	Waveform	Stator Pulse. Used for tachometers