How to create or get a cable to inject PSU's power & GPU's PWM to a fan?

[bornlibra23]

I would like to have a cable to inject PSU's power & GPU's PWM to a fan. Any suggestions? Something like this but with split inputs.

 

[avinandan012]

Do you want to DYI or off the shelf part?

 

[bornlibra23]

I am good with either.