Searching for how they might set up flak positions, I DID come across this, which I found interesting.. (but not what I'm looking for)
Here's a quote, and a link to the page I retrieved the pic from.
"Contrary to what may be a popular belief, heavy, long-range anti-aircraft guns could not track moving aerial targets on their own. The German practice was to have four guns controlled by an optical device called Kommandogerät, or control device. In this case, the Kommandogerät 40 combined a 4m Em (R) 40 rangefinder with an electro-mechanical ballistic computing device. This unit required an outside power source, so a Motorgenerator was connected to a Betriebßchaltkasten, mounted on top of a Sammlergestell; a power transmission line ran from this unit to the KDO40. A data transmission line, the Übertragungsleitung 37, ran from the KDO40 to a Verteilerkasten, which in turn, sent hard-wired data to the four guns in a typical FlaK-Batterie. This is why a heavy FlaK gun had cable reels fitted to its transport limber units."
-http://www.network54.com/Forum/477322/message/1328485138/Kit,+Bronco+CB35103,+German+Telemeter+KDO+Mod.40+w-Sd.Ah.52
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So, while we wait for some feedback.. Does this look somewhat believable?