If you don't have wire taps or can't get them for your gauge of wire, you can also carefully strip a little bit of insulation off of the middle of a wire (even if it's already connected), and wrap the stripped ends of your other wires around the bare section. A bit of solder and some electrical / liquid electrical tape, and it's a very nice sturdy connection.
You can also crimp the ends of several wires into a metal wire cap and add a dab of solder to keep them inside. I did this when I had goofy things like 7-wire junctions in my ground loop.
I wonder... has anyone tried stapling aluminum foil to the underside of their CP, and connecting the foil to ground so they only have to run little 2-inch wires from their switches to the foil? I wonder if it would be difficult to solder to? It would be similar to the way the entire metal case in a car is electrically connected to the negative pole of the battery, so electrical components need only have a positive wire and be bolted to the chassis.