In the below image (from here), the "left" end (which I have labeled "A") is clearly two PS/2 ports.
What is the "right" end (which I have labeled "B")?
Does it connect directly to a motherboard?
The above is apparently Lenovo part number 43N9149, but I haven't been able to find an actual specification sheet for this part -- only third-party seller listings on Amazon, eBay, and the like.
I need to be able to use a PS/2 mouse with a Lenovo ThinkStation that I am considering. The particular system I am considering does not have a built-in PS/2 port, but Lenovo sells the above part as an add-on. The problem is, on my existing desktop (not Lenovo) I have tried external USB to PS/2 adapters (dongles) from third-parties, and I have experienced a significant latency issue when I connect a mouse to it. I mean, cursor movement on my screen significantly and noticeably lags the physical movement of my mouse with such external dongles. I'm hoping that the "B" end above has a faster connection than an external USB connection would have.