Zyxel NSA 325 V2 Auto shutdown e monitoring UPS APC USB

Good evening, could you kindly tell me how to use and make the correct connection to use the "auto shutdown and monitoring" function indicated in the PDF of the characteristics of the NAS Zyxel NSA 325 V2?
We would like to use the auto shutdown function at certain times and in any case check and perform a safe shutdown in case of connection with UPS with low batteries.
Thanks in advance and greetings

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