Hello, 
I have made some custom sleeved cables for my G5 to feed power to my GPU, I need a six pin and a eight pin.
I fear I have made some mistakes - I could really use some help right now. I made notes when I started on witch pins ran were but I'm doubting my accuracy now... on to the point. I need help knowing witch cables need to go from where to where? I have another cable and I took it apart and I'm just not seeing what I expect too. Can anyone please point me in the direction of some solid info on this? thanks in advance

I completely agree with you - I was ill prepared. I started this job back in 2012 on the machine in my signature and for several stellar reasons my whole life basically went on hold until I just picked sleeveing back up as a hobby recently (for another build). The night I started de-pinning I was helping my son with math homework and after that I had a few beers... a great receipt to screw up something. 
I appreciate the information you just shared, I too have run across this information and wanted to be extra sure that I was recreating the PSU cables that came with the unit (albeit shorter) exactly so i cut a few apart and follow each wire from the PSU to the VGA 6 and 8 pins, making notes along the way. The wires did not seem to go from the PSU to the VGA in the same order (or even a mirror of the order). I am going this morning to pickup a multi-meter, if I just make sure I have grounds going to the ground pins and 12v going to the required 12v's then it that correct? Will it be less then optimal? 
Also, how can i be sure what the pin out is of my gpu? I have a Gigabyte 2080 Super... 
 
I hooked these wires up (incorrectly) and thank God it didn't fry my GPU, things just didn't boot. I unplug the GPU power cables and boot again and I get the obligatory 'power down and plug up your GPU dummy' message. So I know I've just screwed up the power. 
 
tl;dr
If i just use the multimeter to find my 12v cables where do i pin them into the connector on the gpu? just like the gent above shared in his picture? thank you for helping me, I promise I am not a total moron, though I challenge myself on that from time to time    they don't call me the ruiner for nothing  
 
 
 
 

Thanks Bob! 
I swung by work then dropped by home depot and picked up a analog multi-meter and was able to see strait away witch were the hot wires, I connected according to your picture and ta-da! 
This is some of the final phase of a build I'm finishing inside a cooler master 130. I managed to fit an open loop inside it for the GPU. I've done several mods to the case and can't wait to show it off, thanks for the assist in the 11th hour with the most challenging part :)  
Interestingly, i read your comment after I grabbed a analog meter so i was curious how it would act if I switched the leads like you were saying, well it just bottoms out the meter backwards all the way to the left past the 0 mark instead of reading a negative number as you said a digital one would. Good enough for me today! :)