daytonaRX

I am trying to install all the wiring for an amp and sub, but I have run into some problems. I alread know, and have bought a line input converter for the RCA hookups, and I know to connect them to the speaker wires, but I don't know which wires they are. The wire diagram that I have tells me this:

L- Black
L+ Yellow
R- Blue
R+ Red

I connected the input converter to these wires and it didn't work.

Also, I can't find where to connect the amplifier turn-on wire (typically the "blue" wire).

Please help. I have seen many pictures of peoples Rx300's with nice systems, so obviously someone knows what to do.

An advanced THANK YOU to any help recieved.