Looking at the wires they don't appear to follow the original PSU. The "fatter" yellow on the original is the 5V...from this conversation. It's not the same color on the Amiga-Kit adapter. Just use the different color but same location wire? Again, I don't have a voltage checker. So I'm providing video to hopefully really clarify...and help.
[ Show youtube player ]
Update: From this site:
http://www.ianstedman.co.uk/Amiga/am...ml#atxadaptors
The 5V is gray...not yellow on the original PSU - going by Power pin 1, it's 6 to push out..which the Site is helpful about locating. Since the Amiga-Kit adapter is using different colors I was a little confused. I have a challenge with seeing shades. So it's:
234
165
...on the original PSU since it's the red wire. I think that's blue on the Amiga-Kit A4000 connector, same spot #6. Hmm..