Constraint with free rotation

[barthok]

Hi, I'm novice user so i have simply qustion.
This's my example of structure:

What type of constraint i must use to conect beams with shell like that: U1=U2=U3=0 and allow to all rotation. I want to the moment at the edge of shell was 0.
In other words, how model linear support with swivel for shell. Sorry for my English, i hope you understand me

 

[barthok]

Ok i know that i must apply connector --> MPC --> pin but i have another problem: in assembly module can't see mesh nodes and how i create wire feature between this nodes?