This is a 2pin to 2pin cable. This is used to connect nVidia Graphic card Spdif in to motherbord's S/PDIF out internal connection.
HP AMD FirePro S7150x2 Accelerator Video Graphics Card - M3X68A
S3 Virge /DX On Board 86C375 VGA PCI Video Graphics Card 4 MB BF
GIGABYTE NVIDIA GeForce GT1030 2GB GDDR5 PCI-E HDMI DVI Video Graphics Card
Gigabyte GeForce GTX1050Ti 4GB GDDR5 PCIe Video Graphics Card GV-N105TOC-4GL
Nvidia Geforce FX5500 AGP 256MB Video Graphics Card
Nvidia GeForce 8400GS 128MB DDR2 PCI-E HDMI VGA DVI Video Graphics Card