Old stereo is out, and I'm trying to connect the new one. There are 3 things I'm looking at. One is two black wires spliced into one which goes to a metal clip. One has a blue wire, and white and yellow wire, a red wire, and a seperate brown wire that is attached to it. The other plastic clip has a green, two browns, a brown connecting the browns, and another brown going off to a clip. There are also the power wires, but I got those hooked up.

So, for connecting the speakers, how do I know front from back, left from right, and positive from negative?

Any help would be appreciated. I'm driving it around without a stereo at the moment because I can't figure it out or find a wiring diagram online.

Thanks guys.