1x PCIe slot positioned behind the I/O shield
1x PCIe slot positioned behind the I/O shield
Reference image shows no.7 and no.2 as display connections, intended for screens but inactive unless paired with a CPU ending in 'G'. No.2 functions as a DisplayPort port (a playful label), while no.7 serves as an HDMI port.
I can't take or provide screenshots of images directly. However, you can view the specific parts by opening the photos in your browser or device and capturing the desired section yourself.
It seems like it might be a Wi-Fi card, but I'm not sure if just inserting one will fix the issue because of BIOS differences.