Here's where to place the zip ties:
I secured the zip ties around this plastic edge, which is left after you've trimmed the plastic shroud away:
And I placed a pipe with a diameter of ~30 mm between the IC and the plastic edge just to get the IC in the right hight and to make the plastic edge a little more stable (you can see the blue pipe on this picture):
The bottom is secured by the piping it self.
The IC haven't moved at all since the install.
I hope this helps.
