I just did the plug version this weekend. The details are posted on lxforums.com
The plug is special and cannot be purchased at HD. One member, F1fan has just bought a pack of them. You have to buy 100 of them, although the pack is under $6.
The wiper is not easily removed and most people, including me, end up breaking it. The motor is removed. Removing the lower inner panel is simple. Here are some pics I posted on the other forum.
It ends up fitting very well. In the Summer, when someone gets up for a closer look, this is what they'll see in the rear.
