The original story was TL;DR so here is my problem: I have a Mayflash board with the cable that contains the wires for both Playstation and usb cut off before the splitter. The usb wires used in the Mayflash are non-standard (white, green, white, and black don’t work when connected to a fresh usb cable,) and I do not have the original usb cable that came with it to test with a multimeter.
This issue is fairly obscure, and as far as I know impossible to solve theoretically without brute forcing it, unless there is someone with the board and the usb who can test it for me.
This is the last step involved with completing my custom arcade stick, and it would mean a great deal to me if someone could help me solve this puzzle. If you require any information from me in order to help solve the problem please drop me a comment and I will find the info.
Thanks ahead of time for any help you can provide!