So to day I purchased my first tortoise switch machine. I'm going to need a total of ten but thought I would start out purchasing one and see how easy or difficult they are to install. So the first thing I noticed is how small the openings are for the electrical connections. My question is what gauge wire do I need to fit in these holes and should it be stranded or solid or does it make no difference? I also noticed they make something called an edge connector for these switches that would eliminate the need for soldering the wires. Has any body used these connectors?