Best thing to do is try to trace them and see where they originate from. Usually they are color coded unless someone added something else in at one time. Also get an ohm & voltage meter. One of these can be picked up for almost nothing at Lowes, Wallyworld, etc. It does not have to be an expensive model. Make sure none of the wires hanging are hot & bare if you are driving the car. This is the quickest way to a fire. If any of the wires are hot (check with the switch both on and off) find out what is not working on the car. This could be the radio, cigarette lighter, trunk light, glove box light, console light, dome light, etc. If some of those are not working then check the color code of those wires also to see if they match back to what is cut. Also check to see if they may be extra speaker wires that someone may have put in. If I run across a site for a wiring diagram I will post it for you.