Hi there. I purchased a pair of 6x9 Speakers and I'm considering installing them in my 1996 C200 Classic in the back

I'm just wondering if anyone can tell me if they've had any experience doing this & have any advice on how to do it. (Ie. Will i have to cut into the back or is it possible to fit them ~ like what are my options in terms of fitting the speakers. Is one way better than another etc)

thanks