The retainer is open sided, and has upper and lower walls with notches for snapping into place in an aperture in {TAIL ~ a mounting channel} in which {HEAD ~ the shelf bracket} is mounted and in overlying relation to said bracket 
in is mounted
The retainer is open sided , and has upper and lower walls with notches for snapping into place in an aperture in { TAIL ~ a mounting channel } in which { HEAD ~ the shelf bracket } is mounted and in overlying relation to said bracket
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL REL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH OTH OTH OTH OTH