Hi @banesrb ,
I couldn’t find any information regarding the locations of the screws in the laptop but here’s a [https://www.asusparts.eu/en/asus/notebook/x-series/x555qg?ProductCategory=Screw|list] of all the screws that are used.
There are no 11mm screws in the parts list so presumably they are the M2*12L (12mm) screws.
Perhaps you could use a thin wire and insert it into the screw holes and then mark the wire so that you can measure the depth of the hole. A difference of 3mm between the screw lengths should be easy to discern