Fan - Mac Pro A1481 (Late 2013) pinout

Hello everyone,
This may be a strange question -
does anyone know what the connection for a 4-pin PWM cable for this fan looks like?
I would like to use it in my project, and it must be connected to a standard USB PWM controller.

Thank you in advance for your help and suggestions.

Regards,

Tom

I rushed to find a solution for the overheating MP6.1. I have the impression that OCLP, in combination with newer versions of OSX, which are more demanding in terms of system resources (RAM, CPU, etc.), cause older computers to work harder. I started looking for a solution and, using 3D and an additional original fan from the MP6.1, I achieved quite satisfactory results without the noise of an F-35 taking off. To improve airflow, I removed the original bottom cover, and the second fan is powered by a cheap 4-pin PWM controller. I soldered the cables into the fan's test pins and added a PVC mesh filter between the two original MP 6.1 fan diffusers.. At the moment, such a fan can be bought in the UK for £19, which is quite reasonable. If necessary, I also run TG pro on low settings so as not to drown out my thoughts :) I think that the whole thing doesn't look particularly awful and is quite compact compared to other designs 🤔