I looked around and couldn’t find a tutorial
No, I’m gonna guess you didn’t.
Right there, first page, under stickies: http://shoryuken.com/f177/intro-rules-tutorials-info-read-before-posting-209057/
There are MULTIPLE tutorials for dual modding, from using a Cthulhu board to padhacking to RJ45 stuff to all kinds of wonderful and lovely things.
That is, if you wanted to do it the real way and solder. If you want an easy solder free tutorial:
But, that board is out of stock and will be for a while. And if you’re doing other dual mods, then it is hard. If you know nothing, it is a long hurdle to do, you may just want to consider hiring a modder instead.
I did but I’m super new to it so I only looked for the word dualmod