What They're For...The extension cords were made to accomodate those who need a longer than normal distance from their camera.
Where They Connect... The extension cords have a "male" end connector and a "female" end connector. Simply plug the male end of your controllers built-in cord into the female end of the extension cord. The male end of the extension cord then plugs into the female receptical on your lens, camera or pan and tilt head.
Fifty feet of extension cord for all LANC controllers and DVX zoom controllers (for Panasonic AG-DVX100).