This illustration shows what appears to be the standard nine pin USB motherboard header, but the photo on The Retro Web shows a non standard pinout. With a non standard pinout meant for a proprietary connector and no documentation, I would verify the pins with a meter.

Indeed it looks like propietary pinout as the pins 7 and 8 are not present and not the standard 8/9 pins usb connection found on most motherboards.
I will check the pins vith multimeter. Is there anything i hav to watch out for so i do not fry something while mesouring live usb contacts?
Also when i want rear usb to work pins 1&2 as well as 3&4 on USB hub need to be shortened (defoult state) if they are opened rear usb doas not work🤔

When measuring the USB pins you do need to be careful to have a steady hand and good light on what you're working on as a slip could lead to grounding the +5 pin, and that could cause damage.

Others may weigh in on this, but it sounds to me as though you'll likely be stuck using either the front or rear ports. A USB card with headers for front USB ports is a solution, but even the best of those will cause a measurable performance hit on Socket 7 systems. Sphere478 decided that he was tired of having too few USB ports so he did this: Re: Adding more usb ports to old motherboards without using a card

I took a look with multy and found that what i thaiugt was ground acctually was 5v power line. I'm stuck now o. How to determine what pin the ground is. Any way to find this?

Though non standard, it should still be a variation on one of these pinouts. To check for the ground pin you should be able to set the meter to check for resistance and put the ground probe on the case, or one of the motherboard's mounting screws. https://web.archive.org/web/20050830011044/ht … le_assembly.htm

I checked USB HUB with multimeter and the pins are in non standard USB layout as follows:
pin 1/2 - data (white)
pin 3/4 +data (green)
pin 5/6 gnd (black)
Pin 7/8 is not present
pin 9/10 5v (red)

hence why it killed 2 of my USB sticks. It still puzzles me why if i want rear usb to work pins 1&2 (-data) as well as 3&4 (+ data) on USB hub need to be shortened (defoult state). If they are opened or if i connect fron USB the rear usb doas not work so i can either have front working USB ports or rear working but not both together.