Oh, hi Matthew, I didn't reconize you at first. If you pick up some older stuff, it will still probably work. The main thing to watch for is the wiring order. Some of the old KO PROPO stuff, others too I'm not familiar with, used the wires in a different order. Generally you could carefully pull the individual wires out of the connector, pushing down on the partially exposed metal tab on one side, and reinsert in the correct order. Black -, red +, and other, the signal wire. Some don't have actual black, but use the darkest hue for black. You do have to have something that goes together to follow, or find somebody who knows that equipment. And you may have to trim the actual connector some to get it to fit, trimming off a rib on one side is common. Of course the rib was there to keep you from plugging in backwards, so be careful.