If i can’t,so tell me how can i make my guitar louder so it play from a speaker?
i’m assuming that you want to hook it up to an amp but…it isn’t wired to do that?as far as the metronome goes (assuming that it is electric)you put the one of those red white and yellow cables going from the back of the metronome into the red and white hookups in your amp, assuming you have them or you could hardwire the metronome speaker to the plugs of the amplifier speaker.if you only have one pickup im guessing you play acoustic so you either need to wedge the pickup across the top of the soundhole or stick it in place close to the strings.then you need to put a hole where you want the guitar to jack in from that will hold a 1/4" audio jack.solder the red wire to the positive part of the audio jack and black to the negative, then turn the speaker all the way down, jack in, play a note and slowly turn it up 
hopefully this helped it was kinda a fuzzy question…