Abstract: A retainer for retaining an elongate flexible element on a support and comprising a perimeter wall defining an interior, with the perimeter wall having opposite ends each having end edges defining end openings. A capture slot extends between the opposite ends of the perimeter wall. The capture slot is defined by a pair of slot edges on the perimeter wall, and the slot edges extend from a first one of the end edges to a second one of the end edges. The capture slot extends along a convoluted path between the opposite ends that requires forming at least one bend in the flexible element to move the element through the capture slot and into the interior of the perimeter wall.