13.5 cm ==> 1.8" if my math is not failing
Given that the inch is defined as 2.54mm (a huge improvement over the original length of three barleycorns), I think your arithmetic is failing, quite badly.
I mean the distance between the drilling holes is on the image (on my laptop) 13.5 cm which equals 1.8 inch on the real board
all based upon the assumption that the distance between the connector holes is 0.1"
Nobody here, who has this display?
Can't you contact the manufacturer, it's website is on the PCB