The main regulator will be the bigger part in the top right. The 5V rail will go to one of those 3 large capacitors on the right,However my control board is unlike yours, any idea which is the 5v resistor.
which one is impossible to tell from that photo.
If you have a voltmeter it should be possible to work out which one. Failing that you may be able to tell by looking closely at the traces on the board.
The two 4 pin parts to the left will then regulate down from 5 to probably 3.3 and 2.5
Again looking at the board is the best bet. From the connector one pin will go to a thick trace, that's the 12v power in. One will go to a large copper area, thats ground. And the other two will be thin lines going to some small resistors near that big square chip, they are the two video inputs.Also the wires in the cord are not of the same color as in your tutorial and would appreciate if anyone could tell me which are for the video feed.
If it was connected like that you wouldn't then be able to use that port. You can bypass the current limit protection on the ports so that you can power more things directly if your power supply has enough power but what you want would only save you the plug sticking out, you wouldn't gain any ports.On another note, does anyone know how to wire a 4 port usb hub directly to the pi, so I dont have to have it taking up space on the usb ports