Ah - exactly as Mongoose shows it.
What cable have you used? The cable for this wiper motor is different in that it has a small rod fixed to the head of the cable (where it fits over the lug on the connecting rod) which will operate the park switch once the motor has been turned off. Most cables do not have this part attached. This entire setup is very similar to XK120/140/150 Jag, so if you have incorrect parts you may be able to get around it by contacting a Jag supplier. This guy is very helpful with obscure wiper parts:
tankard03 | eBay
Roger