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It's interesting that some cowlings have those louvres and some don't.
They may have been added to later models for additional cooling, perhaps?
My guessing that the Fi167 might be the ship, is based on the location of the MG17 groove, the location of the bulge over the exhaust opening. Also, the "looped" feature on the other side aligns with the 167's intake along with the large opening on the port side, which terminates at the top of the cowl for engine access.
On the port side of the cowl, it appears that a portion of the cowling was cut away, leaving a rough (more like torn) edge behind.we'll try to get more pictures from Prague and measurements and also will have him check for any numbers or writings on the inside