MXM socket (PCIE, but for laptop GPU) has many pins, but only need PCB that connects to pins "12v, 5v, 3.3v & GRND" and output to a sata 15 pin power cable to power 12v hardware (laptop default sata is only 5v, but no 12v rail). I have included schematic diagram for MXM with which pins has 12v/5v/3.3v etc, either Sata 15 pin, or 4pin floppy will both work.
please help me on how to design a pcb that can do this, or please direct me to someone who has knowledge about this, thank you!
Floppy 4pin (red 5v, yellow 12v, 2x black are both ground), or Sata power 15 pin.
Schematic of MXM socket and picture of MXM socket
this is a PCB image i have in my head would look like, but outputs 4pin floppy or sata power 15 pin.