From the Asrock Rack TURIN2D16-2T Quick installation guide I see I need to unscrew and remove standoffs from the chassis, under the motherboard, but ...

I can't see any standoffs above or under all the Asrock Rack TURIN2D16-2T motherboards I have:



I did however notice that I wasn't able to tighten the screw on one of the case standoffs for the motherboards, it kept turning but not tightened.

Any idea what standoffs the Quick installation guide is talking about?

I can't see any standoffs above or under all the Asrock Rack TURIN2D16-2T motherboards I have:



I did however notice that I wasn't able to tighten the screw on one of the case standoffs for the motherboards, it kept turning but not tightened.

Any idea what standoffs the Quick installation guide is talking about?