As mentioned, the HF manual doesn't talk about mounting the lathe.
However, the little machine shop has a good manual for their version of the lathe and they say:
Mounting Your Lathe
The SIEG C3 7x14Mini Lathe comes with rubber feet and spreader bars that attach to the same holes used to secure the lathe for shipping. If you want your lathe to be portable, simply install these spreader bars and feet. You can also bolt your lathe to your workbench. The following diagram shows the holes required. Mount the lathe to the workbench with M8 bolts. The bolts should be about 10 mm longer than the thickness of the workbench. Use fender washers on the underside of wooden benches to prevent the bolt heads from pulling through.
Not sure of the purpose for the "spreader bars".