Second GPU Coolbits

I am struggling for quite some while to enable fan control of my second GPU.

Currently I have this in my /usr/share/X11/xorg.conf.d/10-nvidia.conf file:

Section "OutputClass"
    Identifier "nvidia"
    MatchDriver "nvidia-drm"
    Driver "nvidia"
    Option "AllowEmptyInitialConfiguration"
    Option "Coolbits" "28"
    ModulePath "/usr/lib/x86_64-linux-gnu/nvidia/xorg"

This works fine for enabling fan control on my first GPU, but I cannot find a way to also enable it on second GPU.

I tried all possible suggestions in /etc/X11/xorg.conf file, but whatever I try there gives me blackscreens, so only changing things in 10-nvidia.conf works for me.

Hope that someone can finally help me with this.