q45 sound system help

whaddup guys, my 1999 q45 y33 sound system been acting up lately, it has an aftermarket sound system and it seems like the two front speaker and one front tweeters just competely stopped working but the tweeter on my side is the only one working in the front, all the speakers in the backseat (door panel speaker and behind headrest) works fine, any idea what might it be? i think they still work but maybe a bad wiring caused them to stopped working, i saw that behind the trunk piece where you would access the gas tank, theres like a connector with many wires in it that got cut and spliced into the new wires, could this be wires that controls all the speakers? ....or are the speaker wires for the front driver and passenger are in the fender well and i could of been rubbing on them? i still got the splash guard on, thx guys.

what your looking at is the factory amp, whoever did the audio in your car probably spliced into this for speaker signal, i did on mine for my 4 channel there has to be loose connections or just no connection at all for those speakers, look around online for a wire diagram of those wires to find out which goes where.