Im confusing you and im sorry, but this is the way i think you will understand me.

You have a swing right(where little kids like to play), you start twisting it and twisting it....and the more you twist it the higher it gets, the tighter it gets and therefor the shorter the ropes get right.

well thats what im doing to the cable, I'm not actually screwing it on tighter or anything. im just twisting the whole thing making the cable and hook more tense.