Need help with the connections on a 2wd 90amp alternator, There are 4 connections. Being fitted into a mk2 Cortina not a cossy.

B+ large stud, assume connect to battery
D+ Medium stud, assume connected to loom
W small stud, ? Warning light at a guess
+ spade terminal, ?

Was planning on connecting the B+ to the starter supply wire to join the main battery cable, after that not sure what needs to be connected where.