I didnt like having to use a special cable to get the split pickups (+ maning sure correct socket was plugged in) so I came up with this wiring using two Switchcaft 12A jack sockets.
You just need a standard cable in each socket for split pickups.
If you are using it in mono, then it doesn't matter which socket is used - either will output the two pickups.
Hope this is useful for someone :}