If you have 4 binding posts, the gold color clips are the jumpers for when you're not bi-wiring the speakers.
So, connect your cable to either binding post, and then make sure the jumpers are hooked up so that both posts get a connection.
The jumpers should connect the same color posts, and not bridge between black and red.
edit: I personally find copper cable with clear insulator ugly as hell, so I don't use it. If you're going to be using pretty short cables, consider a place that has basic monster cable. Locally, they sell some 16gauge monster for about 25cents a foot, which has a really nice jacket to it. 12gauge is nice, but if you're using 10' lengths, you'd probably be hard pressed to hear a difference. Even a basic non-ugly 12gauge wire should be available for well under a dollar a foot