{TAIL ~ Pull cords} are located within {HEAD ~ each central space} for drawing the elongated items through the sleeves once positioned within a duct 
{ TAIL ~ Pull cords } are located within { HEAD ~ each central space } for drawing the elongated items through the sleeves once positioned within a duct
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH