I then rest the back edge of the shelf against the wall and mark between the wires where I want the clips to fall. I put clips every 8 in. With a level at the height mark, I now mark the exact location of all the clips. The clips are screwed into the framing wherever possible, and the rest go in with drywall anchors. Tiny flexible plastic caps slip over all the cut wire ends.
Shelves snap onto the wall first.
After clips are screwed to the wall, the shelving is snapped in and left hanging. Wherever a shelf meets an adjacent wall, I install a special bracket that holds the front edge of the shelf. With the magnet of my torpedo level stuck to the shelf, I rotate the shelf into place and install the bracket. Clips on the poles hold the fronts of the shelves. While clipped to the wall, the shelves pivot up and snap to the poles.