Need to Know use of these Screws in WRGB II Pro Hanging Kit

But when using Chihiros LED Lights Hanging Stand Kit the style is different i think, below is the link of the stand I am mentioning

 
Hanging Stand Kit includes the screws to hang the Hanging Rope Kit, the Hanging Rope Kit is to hang the light.
Need to buy both of them.

Or if you don't buy our Hanging Stand Kit, you can also put the Hanging Rope kit to each stand this way:
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Thanks, I am using the stand mentioned below for my WRGB II Pro 60 CM, Can I know the preferred height of the light from the water level?
My tank is 60 CM X 40CM with a 40 CM Height.


 
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