1 Channel 12V Relay Module Optocoupler Mount

This is the Product i used:

1 2 4 8 Channel 5V 12V Relay Module Board Shield with Optocoupler Support High and Low Level Trigger for Arduin0
https://vi.aliexpress.com/item/1005001525484340.html

Spax Senkkopf Universalschraube PZ-Antrieb Ø 3 mm x 12 mm 30 Stück
https://www.google.com/search?client=firefox-b-d&q=obi+m3x12+universal+schraube