Just installed LMS 480M with LGS 2000. very simple to do. you got shorted if there were no screws and nuts in the box. as far as clips go, i think they assume you will use wire ties, they are cheap and easy to use. the included owners manual has pretty good instructions. one common mistake people make is that they assume power to the antenna comes from the unit. the NMEA power and the unit power both must be connected to 12 volts and grounded. the white wire from the unit power can be cut and taped reds from unit and NMEA together to 12 volts, blacks, and the nekid wire go to ground. hope this helps.