Plug for Rear Glass Wiper Hole?

[Moglocker]

Glue it in with silicone adhesive.

Been in the auto glass industry for 35 years,jus get a plug that is close and glue it in with urethane,

 

[doc54]

I removed the wiper arm and left the bolt and seal on the glass. Just wrapped it up in some electrical tape so it didn't get/look rusty. It's been on for over a year with no issue and took no work to do.

 

[DougyintheBushies]

Slap a sticker over it and look cool and enjoy the new horsepower.