Originally Posted by Jookbox
... The pickup with the ground connector is closer to the bridge. Whether's that's necessary or not, I don't know.
No, this is not necessary.
At the "old P-basses" the coil with the gnd connection was the "neck coil". The hot connector was closer to the bridge.
What might influence the decision:
Solder the PU to a jack. Touch the magnets with your fingers.
Touching the magnets with the fingers might cause humming at one of the coils while the other doesn't hum (this is normal!!!).
Put the coil which doesn't hum when touching the magnets in the EA position. The "danger" of touching the upper coil magnets is much more likely than touching the magnets of the DG coil ...
Most bass players never notice this phenomenon - as long as they don't know about it.
So, it is not necessary to put the "non-humming" coil in the EA position. You will not notice this phenomenon as long as you touch the strings or any other grounded part!