Design requires disassembly of power supply and modification - disconnection of input path on PCB and connection of wires to switch.
Dangerous voltage on power supply board, do not make unless you allowed to work with 230 V AC voltage and aware what you are doing
BOM:
Power supply (24V, 5A) 1pc
https://www.aliexpress.com/item/1005001555277278.html?spm=a2g0o.order_list.0.0.4de21802FhXiGf
Soldering station kit
https://www.aliexpress.com/item/4000577553855.html?spm=a2g0o.order_list.0.0.4de21802FhXiGf
SPST Switch 13x19mm
Wood screws 3x35mm (4 pcs)
The author marked this model as their own original creation.