I really dont know what else to call them but anyway. I have seen several times ppl using bolts and nuts for the box terminals. Basically drill two holes in the back of the box and put in 2 bolts with wires w/ring terminals from the speakers to the bolts. Then on the outside of the box wire and ring terminal to the ends of the bolt protruding from the box. I added a pic I found online.
The question is, is this a better design than just drilling one hole for the speaker wire and silicon it?