USB to PS/2 mouse adapter Cable Pinout - AllPinouts
From AllPinouts
connector or cable wiring scheme Connecting USB-mouse to PS/2 connector of computer. It works only with mouse which supports both interfaces (USB and PS/2).

4 pin USB A or USB B plug connector to the mouse
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6 pin mini-DIN male (PS/2 STYLE) connector to the PS/2 mouse cable
| mouse Name | mouse Pin | Direction | PS/2 mouse conteroller Pin | PS/2 mouse conteroller Name | Description |
|---|---|---|---|---|---|
| VDC +5V | 1 | <-- | 4 | VDC +5V | |
| Data- | 2 | 1 | Data | ||
| Data+ | 3 | 5 | Clock | ||
| Ground | 4 | 3 | Ground |