Those are with this kind of "brackets" :
Browse Catalog - Cable Ties & Accessories - FTH-9 -Cable Tie Mount,Snap In
and regular zipties. Look also the previous and next pictures in my picture folder...
If you use those with regular ABS you paint those caps to any color. At the moment those come only in white. Much cleaner look than with regular zipties...
I will also try these if they can hold up:
http://www.richco.co.uk/products/cab...&grpcode=G1455