I am trying to jumpstart 850w b3 PSU without atx cable was it is missing and want to see if it is working but have some issues as no pin out diagram is actually listed as 850 b3 or even b3 they only say it is compatible to b3 series but I cannot take that risk so I need to find the 15 pin that grounds the PSU as power-on pin is easy to find but don't know which ground pin is 15th can someone help?

my question is lost on you and no! No tester came with it and the 18/10 to 24 atx cable is missing so showing me the universal side of 24 pin atx does not arouse me a little bit. I need to conform the exact position of the 15th grnd pin on the rear panel as 850 b3 has 18/10 and need to know which one is that or if there are dual 15th grnd pins or if any grnd pin will do as I know the ps on position but have seen two different 15th position on pinouts online.

nevermind tested this pinout and it worked thanks tinus