Hey John, good morning.
Regular neck: South
RW/RP: North
Humbucker is kind of both. Our regular coil splitting diagrams split the humbucker to NORTH, so they can either change it so that it splits to South or put the rw/rp pickup in the neck.
Well things are a bit more complicated because the Ant2 for Strat are north up while the Ant1 are south up, unless you get the rwrp of course. The Tele Ants seem to be all over the place.
In humbuckers slug coils are north up and screw coils are south up, unless you get some Peter Green thing.
Peter Green's LP didn't have any magnet flips IIRC. One of the pickups was wired out of phase (which gives a pretty cool snappy middle position tone FYI).
What I'm gonna do it's buying my 3 pu and use my compass to test each polarity's pu
A single coil pickup has TWO polarities: magnetic polarity and electrical polarity.
By then i can expect that specs:
-Pearly Gates Trembucker Bridge (TB-PG1) SN
-Alnico II Pro for Strat Flat RWRP middle (APS-2 RW/RP) North
-Vintage for Strat Flat (SSL-2) neck South