The purple tint is just the heat-resistant coating - both types can have that.
If they have somehow been torn off a real heated screen then there is no way to reattach. IIRC the connector tails are bonded to the coating on the screen right at the edge. You'd have to take the screen out to see if the pads are there for the tails, which would destroy it, heated or not. The lower connections are at the outside corners so it may be worth taking the lower dash or glovebox off to see if you have the same torn tails at the corners as well. The tails get caught in the screen adhesive so I think it is very likely they came off when the original heated screen was removed.
It seems to me like IR-H is heat-reflective (InfraRed), heated, and IR is just heat-reflective. The German translations use the same letters (infrarot, heizung).
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