It looks like some identical green ones were already cut so I'm guessing it's ok to cut the the others. I'm almost possitive this thing plugged into a XM module that I removed.
That box looks like the module for an old Parrot CK3000 Bluetooth kit. The wires connected to the green and green/black are speaker outputs. Chances are you have a microphone cable floating around in there also. I would guess that the green and green black run up to a speaker in the dash center channel location or to a small enclosed speaker under the dash.
Thanks for y'all's input. I just went on and tore it out along with the rest of my XM module wiring. I thought it was speaker wire since I remember green is usually speakers. Fortunately I put in new speakers so that doesn't matter. Tested it and everything works and there's less clutter behind the dash now.