Chosen Solution

Alright. Long story short. I got this used from a friend. In the process of cleaning I found the metal “pin” for the touch sensor broke off. Could I solder a piece of metal to it or will it be cheaper to replace it?

it wont be cheaper to replace, but it will be better to replace, as it looks quite dirty and you do not wanna be going back and forward having to fix the power, it is better to fix it the correct . way the first time with the new part,solder and a soldering iron.