I am thinking about modding some sort of system where it would be necessary to connect a MOLEX (Internal PSU connection) to a Micro-USB 5V (VCC) connection.
Molex Pinout
Micro-USB Pinout
Now, since I'm not fully aware of the steps, is it necessary to set up a NPN BJT transistor connection to run it through? Could I instead just connect the 5V molex connection straight to the 5V Micro-USB connection in-line, or will that fry the Pi?