Help with installing auto dim mirror

[Richievn]

Hi

 

I ordered an auto dim mirror from subaru america for my car just to find out my EDM car has the below mirror

http://i764.photobucket.com/albums/xx289/richievn/6c15e60be176cb53394ef0c92cf04f87.jpg

 

 

http://i764.photobucket.com/albums/xx289/richievn/52e3bc2c788d311c9c22a20d39f7d3a5.jpg

 

I bought a piece of wedge mirror. Ount of amazon but not sure should i stick it onto the windscreen only or onto the dotted area around the original one?

 

 

Is there any oother ways i van get this do e? Thansk