RBE3 elements and boundary conditions

Good afternoon,

I am simulating a chassis structure, and I want to simulate the posibility that extreme supports can rotate (there is no restriction from wheels, as I send attached the picture. I am thinking into define a node, connect it with the two supports from my chassis, and restrict the dof of the node (X and Y displacements and X and Y rotations in one side, and Y displacements and X and Y rotations on the other side). How can I do that in Simlab? Thanks in advance.

Note: X and Y are included on the plane of the drawing.

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