Where to place a Shelly 1PM with a Fused Consumer Switch

  • I have a fused switch that controls an electric towel radiator. I am trying to understand where is the best place to place the Shelly 1PM, I think I have three options (See diagrams).

    I would love to do option 3, but my understanding is the Shelly 1PM would then bypass the fuse and hence not a good thing