Some of the numbers are unreadable, but the wires are labeled:
1-Black
2-Brown
3-Blue
4-Grey
There is also an unnumbered green/yellow.
I assume:
Green/yellow goes to ground on my switch, same for green from power source
Black (from power source) goes to the switch ( near the off position)
Black and either Brown or Blue go the switch near the on position
White (from power source) is spliced with Grey and either Brown or Blue
I have been using a cordless drill, to grind the grain I set the drill to the position that would remove the screw. Does this mean I use the Direction B?