Well first of all, you should pull the cable through it's sleeve a little more. It seems to me it's too loose.
Second, I didn't quite understand what bracket you're talking about
:
If it's nr. 1, then there's no problem, because that only holds the cable in place, not to flap around too much. (or was it for the brake fluid line/hose?? )
If it's nr. 2, then I can understand, the bug cable sleeve will not fit, because it's a bit too thick. That can be solved easily, by filing it down (did I spell that correct? -- using a file :P ) until it's a tight fit. Lanner reccomends that on his website. Don't worry if it will be a little loose, because it's not going to go anywhere. The swans are gonna keep it there tightly, eaven if the parking brake is not in use.
I took one more picture, that I thought might help:
Oh, and one more thing: By the looks of it, you don't need the small adapter tubes from Lanner, as your alu arms are the late model ones.