Use the double-sided tape set in advance on the back side and attach it to the genuine room mirror.
By using a blue mirror with a curvature of 1250R(ez563)1400R, glare is reduced and a wider field of view is secured than the genuine one.
Minkara
https://minkara.carview.co.jp/partsreview/review.aspx?bi=7&ci=401&mk=5616
* Note 1) If the curvature is increased, the field of view becomes wider, but the image becomes smaller and the sense of distance feels far.
The genuine rearview mirror uses a flat mirror to emphasize the sense of distance.
Zoom Engineering rear-view mirrors provide a wide field of view and a sense of distance.
The curvature of 1400R, which is often used for genuine side mirrors, is adopted.