Should your motherboard either have an 8+4-pin or 8+8-pin for CPU_PWR, I recommend using the available cables with your PSU ...

Am putting together a PC and have run into a problem with the MB/case. The case fan has a 3-hole connector and all system fan connectors on the MB are 4-pin. Case: Fractal Design Define R5 Black ...

To make this connector two pins were removed from the 2×2 pin header, leaving room for the CR2032 battery to fit nicely on an angle.