Is that the left target? My recollection is that it simply daisy chains to the right. They function as one switch and the game can't differentiate between them. Thus, it makes sense both would fail at once. Are the left target terminals wired to the matching terminals on the right target? If so, focus on the right target. Maybe a wire came off while you were working on the left or there's a cracked solder joint, etc. If not that, trace the wiring from the right target back up the line and see what you find.