BE CAREFUL. Don't want to venture many guesses as to what such a lubricant would do to the parts involved. I would recommend getting some sort of contact enhancement solution and using it. It should slicken things up a bit but is designed for that sort of thing too. Before you use some sort of lubricant if you decide to go that route, I suggest you drop an email to the cable manufacterers and ask them for ideas and/or warnings.
Help! Will lubricant affect spkr.cables?
My H.Tech. Pro-9 bi-wire speaker cables are a very tight fit when trying to slide them up inside my B&W speaker stands. If I put some lubricant on the outside cover to help slide them through would it affect the sound of the wires? Any recommendations? I don't want to damage the casing in case of future resale.