How to simulate a simple lever?

Hi guys. I`m trying to simulate a simple lever with kangaroo. but when I set the anchor point of the brep, it is not working at all. why this happened?

And how to set the axis constraint to fix the lever rotation along one axis? for now I can only set one achor, if set two anchors at the same time, they start to perform like elastic when draging rigid.

I just figured it out.
For the first question, simply set a plane on the desired spot will be OK.
For the second, set grab strength to 0.001 will solve the problem.

I`ll leave this post here in case any new user of kangaroo meet the same like me.