Identify SW11 and SW12 which are marked on the removed mini module.

Remove the mini module plastic backing piece to allow for the removal of solder.

Always work in a well-ventilated area when handling solder to avoid inhaling fumes.

Desolder and remove the old through-hole buttons using similar techniques.

Insert the new buttons for SW11 and SW12, ensuring they are properly aligned.

Resolder the connections to secure the new buttons in place.