Shower Enclosure

How do I put my frameless shower U-iron clamp my shower pan?
I have a shower without a frame and a clamp that U supports below is intended to be screwed through a tile base. I have a shower base and cast iron does not compromise their integrity (or Porceline). Does anyone know the best way to place without drilling?
I guess you could try the product, Mighty Putty. It is green at first, but turns white. It lasts about 30-40 minutes to begin to harden and the instructions say that many elements are likely to be put into service after 60 minutes. Wear gloves and read the information on eye irritation. Good luck!
