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