Rockford Fosgate RFX-8340 CD Player "instuctions hook" Questions

I want to find and instuction manually for it I bought a 1999 saturn sc2 and it had this radio in it. I want to hook up a cd changer to it and what to know how it is done. you either have to buy a ...

CD do not eject Everything works but when I press to eject the cd it does not want to eject it does not even stop the cd also the open button on the top right corner does not work ither. I try to open