I have several cables and no idea what they are for. Anyone help? CX13063/U (3 feet long) MS3116E8-3P on one end; MS3116E14-5S on t'other CX13071/U (4 foot long) MS3116E16-26S on one end; U-316/U on t'other CX4722A/VRC (10 foot long) U-290/U on one end; U-393/U on t'other. Thanks! Jan - VE7DJX