Just got a set of RCC 1258's. Included in the box are four black U-shaped spring steel clips and four (wood ?) screws, packaged in two small plastic bags. I can't find any mention of these clips in the RCC manual. My first guess is that they are for securing the RCC units to a shelf but don't see how they would accomplish this. Anyone know what these clips are for? What do folks use to secure the RCC units to a shelf or desktop?