You also need:

-Screws: M5 (I think)
-Momentary Switch Button: https://eu.mouser.com/ProductDetail/Omron-Electronics/VX-015-1C23?qs=1tDaWCEHQQ7x34t0U5t7hA%3D%3D

When flashing a lot of electronics and needed both hands, this Foot Button came handy or "footy". You can press button to activate start of programming cycle.

It can be wired to custom macro keyboard and set to activate or press specified key.