14. The apparatus of claim 13 wherein the second bone anchor engaging structure includes third and fourth opposed pins, the third pin disposed on the first leg and the fourth pin disposed on the second leg, the third and fourth pins projecting inwardly from the respective legs and sized and shaped to be received in cooperating apertures in a bone anchor for releasable attachment thereto.
14. The apparatus of claim 13 wherein the second bone anchor engaging structure includes third and fourth opposed pins, the third pin disposed on the first leg and the fourth pin disposed on the second leg, the third and fourth pins projecting inwardly from the respective legs and sized and shaped to be received in cooperating apertures in a bone anchor for releasable attachment thereto. 15. The apparatus of claim 14 wherein the through-slot is sized and shaped to allow for manual flexing of the intermediate guide tool legs to increase a distance between the third and fourth pins during insertion of the intermediate guide tool on the bone anchor, the third and fourth pins being in inwardly biasing snap-on relation to the bone anchor at the bone anchor apertures.