those are stick on... how the wires route to the interior is beyond me. I would think you would see a bit of the wire sticking out and it may interfere with the movement of the mirror. i bet with one good winter (or one HOT day), the adhesive would come undone and you would have them hanging.... or try and scrap snow off the mirror with those things on there
also, i have a feeling that blue turn indicators are illegal. I am pretty sure signals have to be amber or red. I would bet they are for ORU only....
IMO, if you want signal mirrors, stick with the Muth....