glad you got it sorted. The white and green wires that go to the switch will enable the bridge and neck humbuckers to split themselves in position 2 and 4,
it gives you this selection:
Bridge humbucker
Bridge singlecoil/middle single coil
middle single coil
middle single coil/neck single coil
neck humbucker
You can just as easily not do this, leave the white and green wires taped off, not attached to anything. That gives you this selection:
Bridge HB
Bridge HB/middle SC
Middle SC
Middle SC/Neck HB
Neck HB
I would try it both ways and see which you prefer