Set the "distance" between actors

Hey, i am currently working on a game with a “building mode”. I would create a cable to attach objects to the ground.

My probleme is that i can’t find out how to set the lenght of the “cable actor”. (when i play i can hit my object but the cable extends)

The final plan would be that the cable breaks if too large a force is applied

This is how I manage to create and to moove the “end of the cable” to attach it to an object.
Press p to set the location you want the cable to start (on the ground).
Press p again while you are looking at the point you want to attach.

I hope you can help me
DreiTek