Lenovo Rack Server - RD450X (Hyperscale)

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Hi,

I buy motherboard server Lenovo RD450X MB from taobao (China), I can’t find the user manual

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H8c391c1a03d04e539e04c852cd60372dw1600×1600 486 KB

i want to find front panel pinout of the board
Anyone know please just help

Thanks!