Are you aware how Click-fit systems are mounted?
Well here is my advice (for what it is worth), remove the Click-fit system and scrap it, and fit a new decent mounting frame, explain to the customer that there will be an additional cost and the reasons why and explain that you want the system to stay on the roof, not end up on the drive...
It is debatable whether Click-fit conforms to building regs anyway, but in my opinion using that system is not good practice.
Good luck.