how do i fit and decode a rds eon cd player?

Hi i have come in to a nice find i was on the cattle market in nottingham and found a rdsd eon cd player.
So my question is how do i fit it in to a dawooo (sorry if its not spelt right) nibera and does it need a code as i dont know even if it works yet the serial number is cl0402x0053304 model pu-2294b if any 1 can help then i would be so happy and thankfull