I bought mirrors like these but not sure best way to place them on the car mirrors:
Amazon.com: HDE 1.5" Round Blind Spot Mirror for Automobiles, RVs, Trucks, & Motorcycles: Automotive
See how they have a raised frame on one side? The package says they are adjustable after installation which makes me think the frame can be rotated, but it won't while just holding it in my hand, so I'm not sure if I have to get the angle placement perfect when I stick them on or not. I suppose the deep side of frame should be facing the car?
Also, where is the best location on the car mirror to place it so it doesn't block the car mirror's best rear view? Stick it to the edge closest to the car, or farthest?