wiring terminal polarity

im installing my alpine spr-17ls componens right now and the terminals on the woofer aren't marked, but one of them is bigger than the other. is the bigger one positive? Please answer asap! also does anyone know the wires of an 02 silverado, there is a dark green wire and a light green wire. Does anyone know which one is pos or neg? please help me.blah blah blah blah

the "bigger" one is the positive terminal.. and i also believe the dark green is the positive wire on your stock wiring.. but im not to positive on that.. call the local chevy dealer or a car audio shop in your town and see if they know off hand..S.O.B custsoms.. South Omaha, Nebraska

ok thank you very much and according to another topic someone posted that dark green is neg. Also does anyone know how i should set the jumpers in the crossover?blah blah blah blah