Stock Stereo part Needed...

[Bbqman218]

hi, I had the cassette and Cd player in my car and I sold the Cd Player. Now the Deck doesnt play. For those of you who have replaced the stock cassette in your mazda, I need to buy the clear round plug on the back of the deck, on the left lower corner with the plastic handle on it. If you can help me out, Please do, Thanks, Chris