comment: >
  
  This. It should work. Wish I found this before. I figured this out the long way for weeks out of desperation tweezering my board with lifted pads.
  I was able to use other rows' solder point and got all keys about 5 of them working (yes i managed to bork about 5 pads), but i must say they are all through trial and error.
context: First:  google the m3tt3o “anatomy of a keyboard” article, specifically about how rows and columns work. 
  Second, use a pair of tweezers to figure out which column your switch is on.
  Third, google up a YouTube video on “switch bridge” and bridge with wire and solder to the appropriate spot.