To all of you that have install an aftermarket HU...

i installed my alpine 9855 and it is real tight be hind it, just enough room for the wiring harnes to come out of the radio and bend at a 90 degree angle. to make room for my RCAs i need to cut up some of the plastic behind there and was wondering, if you have cut behind there is there anything behind there i need to worry about or can i just cut it open. I plan on using my dremel and the cutting wheels to do this, but afraid i might cut threw a wiring harness or something to that nature. any help in this area would be great.