Ensure you have Nemesis or FNIS installed to handle the custom animations required for the physics to function correctly.
Download and install CBBE 3BA (3BBB) via your mod manager ( Vortex or Mod Organizer 2 ). The BodySlide Workflow: "Building" Your Body Skyrim mods tutorial - how to use 3BBB
You generally need both CBPC (for collision-based "jiggle") and FSMP (Faster HDT-SMP) for more complex, fluid movement. Ensure you have Nemesis or FNIS installed to