The rack mounted WRL will fit in a standard 19” rack system, mounting screws are included. The rear panel of the WRL has up to eight connectors built into the box depending on what options are ordered. The yellow wind sensor cable plugs into the singe yellow RJ45 connector in the rear of the console The blue intermediate cable (which contains the rain, outdoor temperature and humidity cables) plugs into the single blue connector in the back of the console. The indoor temperature sensor (red) is on a three foot cable and is plugged in to either red jack of the console. If you have the aux temperature or solar options, the red intermediate cable will plug into the other red jack which is mounted in the rear of the console.