Concorder 1994 Radio

Hello folks, anyone knows where I can get info on the circuit
on my Concorde 94 Stereo ?

I trying to figure out the right spot to add lines so I can hookup
my portable cd player.

There is a couple of chips I had not be able to find thier
datasheet, there is connector, were the cassette connects
this will be the idea spot, however, some of those pins my
get switched on & off when you put a cassette, that's how
the stereo switch from radio to cassette.

If I knew the model, I could try yo get the schematic.

Thanks.

Why not use a Cassette adapter for the Portable? It looks like a regular cassette tape with a wire coming from it that plugs into the Portable CD Player. Or you can get an FM Transmitter that will plug into the Portable and play over the FM Radio.