Mac Mini Fan Pin assignment

Dear all,

hope you doing all well…

does anyone have any idea whats the pin assignment for the mac mini A1347 fan connector ? Since I changed the HDD/SSD the fan doesn't feedback no longer the RPM. I did attach all temp sensors and they giving a value in the macfans speed control app. However the RMP values still stays at 0. I did reset the SMC also but no effect. It seems this would have done it as when I power on the mac the speed drops but during the startup the fan increases speed again. Seems the fan doesnt feedback the signal.

Thanks and take care

Sandro