Cd Changer in 99 Mountaineer

I just bought a new (to me) Mountaineer last Sat. It came with a 6 disc cd changer installed in the console. The prob is that the previous owner installed an aftermarket JVC cd player in the dash, and now the changer doesn't work. The model of the JVC is KD-G210. I know technically I have a working cd player in there, but I would really like to use my changer. Is there anyway I can hook the JVC up to it? Actually, I am up for any ideas you all may have on here. I am stumped as for what to do. :shakehead