Newbie needs yatour help

[Deano tino]

Hello everyone
I'm Deano tino, it's a 2004 se auto with 80k.

I'm trying to install a yatour but I have three plugs on the back of my standard cd player (cy460)
But they are all in use. I have no cd changer. Can anyone help?
Thanks in advance

 

[edk]

Can you trace where the loom goes from the cd changer port?

 

[Deano tino]

Thanks for the response, I couldn't trace it far enough, but it seems to go behind the glove. I unplugged it and everything still seems to be working. I've looked at the floors in the front of both sides but cannot see anything. (Is that the only place a changer would be?)