ToolHead Addon interface pinout

Bambu Lab H2 Series
1

Hey there

Does anybody know pinout of tool head interface?

I think 40$ is absurdly high for laptop fan in plastic casing (aka Tool Head enchanting fan), so i want to make my own mod

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2

Understand that port is on the “Bambu bus”, it isn’t just a power connection. The toolhead board communicates and identifies the modules plugged into it.