A clip, comprising: two opposed arms , each of the two opposed arms defining an elongated axis and a mounting structure at an exposed end thereof; a bridge connecting the two opposed arms at a location spaced from the mounting structures , the bridge defining an axis that is perpendicular to the elongated axes defined by the two opposed arms ; and at least one channel defined between the two opposed arms ; wherein the mounting structure associated with the first of the two opposed arms comprises a first upper extension and a first lower extension , wherein the mounting structure associated with the second of the two opposed arms comprises a second upper extension and a second lower extension , wherein the first upper extension and the second upper extension i) extend in a plane that is perpendicular to the elongated axes defined by the two opposed arms , ii) extend in a plane that is aligned with the axis defined by the bridge , and iii) extend away from each other; wherein the first lower extension and the second lower extension i) extend in a plane that is perpendicular to the elongated axes defined by the two opposed arms , ii) extend in a plane that is aligned with the axis defined by the bridge , and iii) extend away from each other; wherein a first cavity is defined between the first lower extension and the first upper extension , and a second cavity is defined between the second lower extension and the second upper extension ; and wherein the first upper extension is longer than the first lower extension , and the second upper extension is longer than the second lower extension . two opposed arms , each of the two opposed arms defining an elongated axis and a mounting structure at an exposed end thereof; a bridge connecting the two opposed arms at a location spaced from the mounting structures , the bridge defining an axis that is perpendicular to the elongated axes defined by the two opposed arms ; and at least one channel defined between the two opposed arms ; wherein the mounting structure associated with the first of the two opposed arms comprises a first upper extension and a first lower extension , wherein the mounting structure associated with the second of the two opposed arms comprises a second upper extension and a second lower extension , wherein the first upper extension and the second upper extension i) extend in a plane that is perpendicular to the elongated axes defined by the two opposed arms , ii) extend in a plane that is aligned with the axis defined by the bridge , and iii) extend away from each other; wherein the first lower extension and the second lower extension i) extend in a plane that is perpendicular to the elongated axes defined by the two opposed arms , ii) extend in a plane that is aligned with the axis defined by the bridge , and iii) extend away from each other; wherein a first cavity is defined between the first lower extension and the first upper extension , and a second cavity is defined between the second lower extension and the second upper extension ; and wherein the first upper extension is longer than the first lower extension , and the second upper extension is longer than the second lower extension . <EOS>