The above picture from Mirzayev is a misrepresentation (deliberate or not) of what I was suggesting. Nor did I mention anything about enemy vehicles. In fact, I thought it might be more useful as an indicator as to nearby friendlies that are hit or knocked out, giving the player a visual clue of the direction of threat prior to the AAR. On enemy vehicles, they wouldn't be visible at the ranges you usually engage them. They would be tiny textures, with normal maps stuck over the tank texture much like the current decals. The game records where these would go already.
It was just a suggestion.