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The locations of Domoticz differs indeed from other distros. Domoticz is mainly written/setup for Pi systems.
I'm not an expert on this field, but look at my post on the Domtoicz forum with regards to the Plugin Manager
https://www.domoticz.com/forum/viewtopic.php?f=65&t=22339&p=265774#p265774
Maybe you can do the same for the Zigate plugin -