Hi, I am replacing the front door speakers in my 03 with the JBL system. I took out the old speaker and there is some kind of white rubber coated thing wired into the speaker and clipped into a built in part of the speaker mount. My question is what is it and do I need to keep it? The new speakers won't fit into the mount with that thing in there. I would like to eliminate it if possible to simplify the install and I'm in a huge rush as I am leaving town tomorrow on a long road trip. Anyone know the answer? Thank you!