When you get them and open one, you'll find the larger bus wire will have a passage that passes straight through near the hinge and the smaller has only 1 entry with it blocked on the other side. Hang the hinge over the Buss (that's the side with the pass through) and just close it enough to grip that wire at the spot on the buss you want it to be. Insert the end of the feeder up to the stop in it's passage and press closed. There is a special plier for doing this that presses against the sides of the IDC and presses flat and even. Good to have if you have lots. Square ended pliers will work but might not clamp up so flat.Thank you! Just wanted to thank everyone for their responses and advice. I feel confident going forward with my wiring now. I have two 4 X 8 sheets of plywood with a 3 x 4 connecting panel, making a U shape. Keeping things simple to start with, so just a single, DC track. Planning on using the 16 gauge for bus, 20 gauge for feeders, run the bus lines around the circuit and using connectors rather than soldering feeders to bus lines.