Product review (5 stars): Anchors and easy fix.
Worked perfectly.  Adhered to Quartz counter great.  I screwed the two dishwasher tabs into the anchors before adhering the anchors to the Quartz.  Then I pressed the anchors in place.  Got perfect placement without struggling to find screw holes upside down.  Gently clamped them for the time recommended.  Easy solution to an annoying problem.