Renogy is a good brand. It's a good idea to have a spare controller, since that's the "brains" of your system. It may have come with MC4 connectors, which have become the industry standard, and the cables are usually all black. I always check panel polarity with a multi-meter, since many of the panels come from China, and those guys are prone to making mistakes. Most of the controllers require that the batteries are connected first, then panels, and then the load. And it's normal for only one battery type to be used, since different battery types require different charge rates, also the maximum charge voltage will be different, as well as cut-off minimum voltage. You're well on the way to having a solar powered amateur radio station.