radio code

Ok so second insight i have and love the cars. I am swaping my base 2012 honda insight radio to the nicer looking ex or lx radio i believe. The plug dont match and i have not been able to find my answers on this most just want a new crazy radio and i really just like the standard honda one see...

Hi, I've just bought a 1st Gen Japanese import. It was 1st registered in Apr 2000. I have no radio code and am concerned that the radio will get locked out if I ever disconnect the battery. Can anyone tell me if the Audio System fitted to these cars in the year 2000 were security code protected...