Hive SLR1c and Hive SLT6 setting up schedule heatings


I have:
Hive SLR1c and Hive SLT6
SONOFF Universal Zigbee 3.0 USB -P Dongle

I have no Hive Hub, but I would like to set up schedule temperature and set up it somehow on the Hive device. Permanently.

I also have Home Automation with Zigbee2MQTT integration, all latest, everything is connected, but not sure what next, I found this: GitHub - greeeny101/Hive-Thermostat-Zigbee2MQTT: Zigbee2MQTT Hive Thermostat Configuration
but don’t know how/where to save files. Any help?

Please advise