Whirlpool  SC8720EDB Use And Care Manual page 13

Orifices
3. Set the surface burner accessory into place.
Mixer tube openings should be pointed
toward the orifices. Slide the burner
toward the orifices until the opening for the
ignitor is over the ignitor. Lower into place
until the notches in the side of the burner
bracket rest on the burner supports, and
the ignitor is centered between the two
flash tubes. Be sure mixer tubes are over
the orifices.
Mixer tube openings
Ignitor
Flash tubes
Ignitor
opening
Side openings
Supports
SURF ACE BU RN ERS
Aeration tray
Burner basin
4. Set the aeration tray into place. Insert
the prong at the end of the tray into the
opening in the end of the burner basin.
Lower the other end into the cooktop.
5. Place burner grates on aeration tray.
Prong
13