Changing the pin-out in a Playstation-> Neo Geo adaptor

A friend of mine wants me to change the button pin-out of his adaptor. He gave it to me opened in a hard way (he broke the outer plastic box as he didn't find the screw under the label ) so I only have the pcb and the neo cable sticking out of it. Well, I thought it would be just a matter of locating the 4 wires that correspond to the 4 main buttons and re-order them. This is what I found:

SP2 green [] A 13 -> C
SP3 dark yellow X B 5 -> A
SP5 light yellow T C 12 -> D
P0 orange+gray O D 4+9 -> B

where the first code is the label on the pcb, then the color wire, then the PSX button (T for triangle), the original Neo Geo button and the pin of the DB15 corresponding to it. Finally that's what he wants that button to be. So I just desoldered those 5 wires (as the D button is doubled) and resoldered them this way:

SP2 light yellow
SP3 green
SP5 orange+gray
P0 dark yellow

Well, now I'm trying it in my consolized 2-slot and it just doesn't work at all anymore. After looking at it carefully, I noticed that other than the 9 pins of the PSX plug there's a small metal panel on top of the middle pin, that makes contact with a similar panel in all PSX controller's plug. But after removing the outer box of the adaptor, that panel just isn't connected to anywhere. The question is: should it be connected to somewhere for any PSX controller to work?
This is the only possible cause I could find of it not working.

Any help will be appreciated. Thanks.

OK, I just tried it in my 1P port as opposed to the 2P port as I did yesterday and it worked. Now it even works in the 2P port if I move it a bit in the socket, so I guess it was because of bad contact or something like that.

Amano Jacu said:

OK, I just tried it in my 1P port as opposed to the 2P port as I did yesterday and it worked. Now it even works in the 2P port if I move it a bit in the socket, so I guess it was because of bad contact or something like that.

Click to expand...

I was going to attempt a button layout change, but after opening up the adapter, I didn't want to ruin it. Thanks for posting your results. It looks a little bit more difficult, than you make it sound.

Well, it is actually that easy, you just need to open it (by unscrewing the screw under the sticker), locate the 4+1 wires I mentioned from the dozen that go from the pcb to the cable, desolder them and rearrange them to your liking. Just be careful not to damage the connection of the rest of the wires.