Krone Big M 2, KMC1 backup battery location

Hello, does anyone on here have experience with Krone big m 2s? I have a 2005 yr model machine,and it keeps displaying a message saying I need to replace the 3v backup battery in the​ kmc1. I have searched the manual and the electrical schematics and asked a dealer who didn't act like he had a clue. I can't find the KMC1, (Krone machine controller). Thanks

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Krone Big M 2, KMC1 backup battery location