Issues regarding the Self-Organize Catenary in Kangaroo

Greetings guys,

I'm a newbie in kangaroo. I have a problem when I'm trying to do step number 5 and number 6 in the Concept Diagrams picture below. So far I got the step number 4 working but when I tried the Power Law component in step number 5, the attraction simulation did not occur anything. Moreover, how can I change the heights of Catenary (step number 6) when the self-organization occur? I do hope you guys can help me.

Thank you.

Best regards.