Need for measurement

      Need for measurement


      I had bought a second-hand MORA3, and I am considering buying a second one and placing it above the 1st
      And I will need this measurement,

      To see the "distance" between the 2 "holes" when the MORA3 are stacked, to choose which fitting to put
      I would like to have the precise measurement and I can't do it (the MORA is already in place)

      And, by any chance, there is a fixing to fix the 2 MORA3 together ?

      Thanks for your help