SW-MOTECH Alu-Rack Top Case Rack Adapter Plate let go lost my Givi topcase

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On the 8th day of a 10 day 3500 mile trip to Arkansas, Texas, Utah, Arizona, Colorado and New Mexico I lost my 47 litre Givi topcase. It was mounted to an SW-Motech Alu Rack with SW-MOTECH Alu-Rack Top Case Rack Adapter Plate. The adpater pale came loose from the Alu Rack. It is held to the Alu Rack with three quick release cam lock screws. I was initially doubtful of the security of these connectors but they worked well for 30,000 miles. I did not notice the case was missing until the next gas stop so it could have been lost anywhere in the previous 160 miles. I backtracked for 20 miles and gave up as 4 friends were waiting on me and we were on a schedule.  I have attached a picture of the adapter plate that failed.