I own a ukulele now. A couple of hours in, I know about four chords and can plonk my way through a stumbly cover of Radiohead’s “Creep.” I call that progress.
So here’s how it goes: In this photo, starting around 10 o’clock, we have an earphone jack (an output). Next, counter-clockwise, we have the MP3 input. Then at the bottom of the ukulele, we’ve the most obvious output … a 1/4″ to-amplifier jack in the strap knob.
And now you know.