Attaching S-5! CorruBracket 100T - Corrugated Metal Roofing Solar

Just a quick video showing how each it is to attach S-5! CorruBracket 100T to a metal roof.
Here is a link to the product (google to find suppliers, doesn't appear to be on Amazon anywhere):
s-5.com/produc...

[@labaguebezai4973]

You missed the the most important part which is how does the grab assembly attach to the bracket when you’ve already drilled it into the roof???

[@daniellemckimhawaii]

shouldn't the brackets be in line with the roofing screws that screw into the purlins? What is he screwing into?