PO3-640 - Noctua NH-U9S what size and length screws I can use.

vZehq1_

I own a acer Predator Orion 3000 PO3-640, i7 12700f and a Rtx3060TI. Recently I bought a new CPU cooler, Noctua NH-U9S, and I am struggling to install it because I either have to remove the motherboard and swap the backplate (Which I have never done previously and I am not really looking forward to doing so) or I can use different size screws as I read on a different post however I do not know what size and length screws I can use.

Please can someone help me find the easiest solution to apply this cooler as my temps while gaming (On maximum fan speed) are reaching 100°c

[Edited the thread to add issue detail]

chugzilla

it should be 4-3mmx10mm.