Steps to Set Up the Ground Block
Now place a fixed ground point at position (3,4,5) in the World CS:
In the SimMechanics library, open the Bodies library.
Drag and drop a Ground and a Machine Environment block from the Bodies library into the model window.
Open the Ground block dialog box. Into the Location [x y z] field, enter the vector [3 4 5]. Select the Show Machine Environment port check box. Click OK to close the dialog. Connect the environment block.