after trying several, ended up using this camera: https://www.wish.com/product/5d80a3a..._wcB&share=web

all the features are:
1-is easier to install: from the mirror just 1 wire to the camera and another to the cigarette lighter;
2-it can change instantly to rear view mirror;
3-it fits on the mirror, so you dont have anything blocking the view;
4-it also has other features, like front view camera that films whatever;
5-the quality of the image is great.