Hi Peter,
FAR 62 was in X. A.K. in 1914, Stab and I. Abteilung stationed in Oldenburg, II. Abteilung stationed in Osnabrück. Not sure to which Abteilung the 4. Batterie would belong. Source: "Führer durch Heer und Flotte", Friedag, 1914.
Even better when there is a family connection.
Regards,
Lars