Do not operate the burners without all parts in place.
Place the burner caps and heads on the cooktop.
There is one small, one medium, one large, one oval (center), and one extra large burner head and cap.
Make sure that the caps and heads are placed in the correct locations.
Make sure the hole in the burner head is positioned over the electrode.

Oval (center) burner head/cap assembly
Medium burner head and cap
Small burner head and cap
Large burner head and cap
Front of range
Extra large burner head and cap
Hole
Electrode