These tray locking members 50 wedge against {HEAD ~ the flat side} 51 of {TAIL ~ the extrusion} 37 to secure the tray 15 in position and prevent it from sliding from side to side 
of
These tray locking members 50 wedge against { HEAD ~ the flat side } 51 of { TAIL ~ the extrusion } 37 to secure the tray 15 in position and prevent it from sliding from side to side
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH