Calling all car blind spot mirror experts

[MillCreek]

Imagine you are looking at your left side mirror from the drivers seat.  The upper left quadrant is one.  The upper right quadrant is two. The lower left quadrant is three. The lower right quadrant is four.

You want to put a small round convex blind spot mirror on your left side mirror.  Which quadrant should you place the mirror to maximize your blind spot visibility?

[K Frame]

I have one of the square ones (I feel that shape gives a better overall view). I put it at the bottom of the mirror sort of straddling quadrants 3 and 4, but biased towards 4 (which was more for allowing the mirror to move unhindered).

[Tuco]

Quadrant 3 is my 1st choice.
Quadrant 1 is my 2nd.
This will vary on the driver's actual eye position and the vehicle type.  For example, a short guy in a tall truck will see a different picture than a tall guy in a subcompact. The taller vehicle would be better served by a quadrant 1 mirror, the lower car  benefit from a quadrant 3 placement.
I'd try masking tape in the driveway before obligating to a permanent mounting location.

Neither 2 nor 4 because the right hemisphere simply pulls in a better view of the vehicle unless I've got the seat waaaayyy forward.

[Kingcreek]

Try sitting in the driver seat with the window down and move the BSM around before attaching it.

I really like that our new vehicle has no blind spots. As soon as you twitch the turn signal you get a high res camera view on the dash display. With all the cameras and collision avoidance tech it makes it really easy to drive safe.

[MillCreek]

^^^My wife's 2020 Hyundai Santa Fe has the blind spot cameras such that when you turn on the turn signal, that side camera turns on.  The problem is that more so on the left, the camera lens is obscured by water when it is raining and the car is moving.  And it rains a lot in Seattle. So you get great views of what looks like a waterfall with that blind spot camera but you sure can't see the lane or traffic.

[HeroHog]

3 is where I put mine MOST of the time, 1 the rest.

[K Frame]

I had my quadrants mixed up. I was going in clockwise fashion.

So, my mirror sits primarily in quadrant 3, as close to the far left of the mirror as I can get it and not interfere with the mirror's motion.

[MechAg94]

My first thought is to put it at the bottom or underneath, but top might be better.  I want to be able to see the ground in my regular mirror if I move it.

[bedlamite]

Maybe not the best pic, but the I keep the horizon at the top of the mirror, the vehicle is at the inside edge, and I use the 2x3 square convex mirrors at the bottom.

[JTHunter]

Years ago, I had a Toyota 4WD p/u that had the sizeable (4x6 ?) outside mirrors.  This was the early 80s and the right-hand mirrors were still the "flat" style so I put a 2" round convex mirror in the upper right-hand of the passenger mirror and a 1.5" round mirror for the driver's side mirror, also in the upper right-hand corner.  As I had a shell on the bed, that corner was pretty much a "dead" area and that round convex mirror gave me enough detail to see colors & shapes and make me take a closer look.