The following connections and colours are from RAVE, for a '97 Defender - not sure if it helps ?
3-way connector, pin 1 - live feed from wash/wipe switch to rear wiper park switch (Green/Brown)
pin 2 - park switch (Green)
pin 3 - Earth (Black)
2-way connector, pin 1 - Motor Earth (Black)
pin 2 - Live feed to Motor, from wash/wipe switch (Green/Red)
Jim