I need a smaller antenna with a short cable because I replaced the windshield in this Fiat 500 with a windshield listed as, without satellite radio, so it doesn't have a large enough frit (blacked out area) to mount it without it being visible from the outside. The glass was less than half the price of the ones "with satellite radio" which is why I went with that. I want to use one of these Sirius antennas on the left to replace it with. The only issue is they all seem to come with 20+ foot long cables. Do they make any with shorter cables? Is it possible to cut and splice the cable to make it shorter?