I got a SYL8884PCI-EIO motherboard,
There is a 6-pin interface labeled CN8 next to its keyboard interface, because the manual information cannot be found.
I found GND, 5V by measurement.
There are also two directly connected to pins 199 and 200 of the UM8886 chip.
According to what is described here: Success: Adding a PS/2 mouse port to the Shuttle HOT433 (using a dedicated keyboard controller chip)
It is mouse data and mouse clock.
I have a question, if I connect the ps2 female directly and connect the mouse, will it cause damage to the UM8886?