I don't use C3 but I don't think this is currently possible without a custom physics plugin. Same can be said for C2 I'm pretty sure.
I thought I replied to this. Any feature you had a question about? The examples were all over the place and I'd rather not dig them up.
Pretty much you'd just add the behavior to two objects and at the start of layout use one of the add joint actions. It asked you to specify the uid of the other object and you'd then mess around with the other parameters.
Any motion would probably be done on a top view. I hear many find the pathfinding behavior useful for ai.
You'd then hide the top view and place the objects in a way to match the effect.
I've abandoned the effect though. I found it too tedious to use. The math to position objects is basically taking what the effect does and reversing the math.