This is the line that killed you for actually knowing what you’re doing. If you finally figured out, there is a good chance you didnt know what your are doing, and possibly still dont.
There is a pretty decent tutorial with pics on here the someone did not too long ago. Check it out. Will show you how to strip, connect, solder and tape (although i think he used heat shrink stuff instead of solder.) If you have NO experience with this stuff at all, i would suggest contacting somebody who does for help, or you run the risk of ruining all your stereo components.