Fortunately, the only wires I am using from the two bundles are the 2 NEMA 0183 wires to my antique Radar. And, the TZ12 interfaced nicely, thanks to a little wiring help from this forum. As suggested, I should have used removable connectors and will do this. Being an old retired salt, the electronics budget allowed 3K for the TZ12 this year and 3K+/- for a real radar, depth, and back up camera next year. Just need a little help telling me which Transducer to order to get depth, temperture, and speed? I would like depth and temperture, speed is optional. I am not an avid fisherman so I don't need the best fishfinder money can buy. Just an average bottom detail will be more than adequate. Very much appreciate the prompt and accurate responces from this forum. Thanks, Rick