Deep deep rabbit hole there. The terminations getting hot is just one step in the chain of events. Once heated, the copper lug will return to its original size, within a few hundredths of a thousandth of an inch. The aluminum, however, softened during the heating, flowed a little bit, so once it cools it's a few tenths of a thousandth of an inch smaller. The clamping pressure lets off a bit. Do that often enough (eg. air conditioner, refrigerator, stove power on/off cycle) and it's going to get looser every time. Also, as it gets looser, the lower pressure allows the resistance in the connection to increase. Higher resistance puts more heat in the connection, making it hotter the next time. Slippery slope.
The clutch connection I referred to is the mechanical means to allow pulling on the cable but letting it turn freely at other times. In that way, it's like the clutch in an auto, except it works in the opposite way. The car's clutch is normally closed, the WT's clutch is normally open. The car's clutch transmits torque, the WT's clutch transmits axial force. I've seen a variety of these actuators on wind turbines, and I put them in a general category that I refer to as the "clutch" style. Thanks for referring to FillM's example of a cable up the center of the tube like yours. I'd forgotten about that one, and you gave me a bit of a stroll down memory lane. I'd contributed a bit to those discussion back in 2009/2010. Ah, but I was so much older then.
Manual furling is a feature that I want, but I'm still trying to balance it with my other desires to have a very simple power cable. For now that means a pendant cable with no slip-rings, in my mind. But I can't square that with a power furling cable that also passes through the inside of the tube - they would tangle. So I am still considering the clutch style furling actuator that works as a sliding sleeve outside the tube. If I decide I don't want that, then a cable actuator such as yours will be the order.
Another deep rabbit hole... I'm thinking about the next tower I'm going to build. I have had it with the tower I have. The power cable is twisted up again so tightly that it will soon prevent yawing. I made some fatal mistakes when I first built that tower and the fatal moment is almost here, and unavoidable. Enough about my story. If I want to tell it, I'll start a new post on the subject. Right now I haven't even decided what to do.