First I have bought a 3 - wire ribbon cable and a round aluminum tubing from the hardware store. The aluminum tube I cut into 3.5 cm long items. Then I painted the items and the ribbon cable gray. Now I screwed 6 cm long screws through the plywood and chipboard. About this the cutted aluminium tubings were placed and glued with super glue. Final I glued the ribbon cable to the aluminium tubings and fixed with clothes pins. Alternative you can attach the cable to the aluminum tube pieces with small screws. Maybe someone wants to try it.
Regards
Rainer
