Well, if you are just looking for a visual effect and don’t have your heart absolutely set on using actual cable components, you could just make a regular mesh and use World Position Offset in its material (I believe the material editor even already comes with a simple wind function). That technique should also work regardless of if you are in-game or not. 
If you only want one end to sway and the other too look like it is firmly attached to something, you can use vertex painting as well.