Kenmore PG-40409S0LB-COSG User & Care Manual page 27

Heat Diffuser, Cooking Grates and Warming Rack
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 Place heat diffusers over burners. Diffusers will fit in firebox in either direction. Fit tabs in firebox front
through slots in diffuser tips. Fit diffuser tips over tabs in firebox rear.
 Place cooking grates onto grate rests at front and rear of firebox.
 Insert warming rack into brackets at top of firebox with upcurved edge to front as shown.
 Stick the magnetic smart device on the left side shelf fascia.
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