AC Replacement Adapter for Casio CT-638 CT638 Keyboard Power Supply Cord

well I got myself another keyboard this one here I'm hoping is gonna replace this Casio that I bought for 20 bucks a while back the Casio is pretty decent but it doesn't have any of this learning stuff on it this one here you can set it up to show you how to play songs and chords and all this other stuff the trouble is I trash picked this and I don't have the proper adapter for it so I don't know if it works yet is what I'm going to do is I'll probably tear it apart and just make sure there's nothing going on inside of it blown capacitors or anything like that and I'll try to find an adapter I took a better look at the symbols on this DC port so this part here is normally negative on this thing it's positive so this is my Casio 9 volt adapter which is the same voltage as this but luck would have it won't friggin fit that's too small alrighty so since I can't find the proper adapter I th