Spark plug wire terminal - Crimp, Solder, or neither?

[Ziggster]

I'm ready to run some plug wires I purchased a while back, and they came with these terminals. I've done some digging, but really can't find info anywhere as to how these are to be attached to the wire. I'm guessing that they are not crimped, but not sure. Also, the wires I purchase have about 1/16" of the core wire extending past the insulation. Any advice would be much appreciated.