Exactly what you want to do depends on where the new usercontrol is supposed to go: if it's inside your existing control, then it's no problem:
TenantSetup ts = new TenantSetup();
ts.Location = new Point(100,100);
Controls.Add(ts);
If you want it added to the form that contains the original UserControl, then that's a little more complicated, because you need to ask teh for to do that for you. Have a look here:
Transferring information between two forms, Part 2: Child to Parent[
^] - it's forms based, but if you mentaly replace "child form" with "my UserControl" it's exactly the same procedure, and the same code as well.