The user can create a joint entity as follows.
•Point
•Point: Selects a point on two bodies to define the location of fixed joint.
•Body, Body, Point
•Body: Selects a base body of fixed joint.
•Body: Selects an action body of fixed joint.
•Point: Selects a point to define the location of fixed joint.
•Body, Multibody
•Body: Selects a base body of fixed joint.
•Multibody: Selects action bodies of fixed joint. The location of fixed joint is to be CM marker of the action body.