Take off the nut cap on the wiper arm and remove the 12mm bolt.
Remove the arm and the cap underneath.
Then remove the next nut and the washer.
You should now see the rubber cushion.
Open hatch and remove the interior panel.
Remove the 3 10mm bolts, and disconnect the wiring harness.
The motor should then come out easly.
Then all you have to do is remove the rubber cushion.
I used this kit from ebay.
Link
It looks kinda like this, you can barely notice the plug.