The cable holder has two side walls and a bottom wall, with grooves at {HEAD ~ the tops} of {TAIL ~ the side walls} 
The cable holder has two side walls and a bottom wall , with grooves at { HEAD ~ the tops } of { TAIL ~ the side walls }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL