Are you using the stock stereo? I put subs under my seat and used the stock Bose head unit. All I did was buy a converter box that had RCA hookups and run them into the rear speaker wires. Its real easy and sounds just as good as a aftermarket and RCA to the rear.
To answer your question. There's some clips but if you pull on it slowy one side at a time you should be fine.
Also if you have any other questions just ask.
