I need help identifying the plugs on an antenna rotor. The unit is a WILSON WR-500 and I need to make a cable for the Control Box to the Rotor. I have pics of the plugs & socket . . . I do not have the plugs shown in the last pic. The plug on the rotor has a threaded collar to lock the cable in place after the plug is inserted. Who were / are these plugs made by and are there any current items that will work ? Thanks, in advance !