Locate and shut off 220 volt breaker to Stove/Oven. Remove baking racks from oven. Use phillips screw driver to remove two phillip head screws holding bottom baking element in place. Slowly pull out element/wires and use volt meter to check for presence of voltage. Remove wires from element by pulling off female spade connector, push wire connector onto new element, carefully push wiring and element end thru rear opening and secure with the two phillip head screws. Replace baking racks, turn 220 volt source back on and test element to a high temperture, leave oven door open, new element will smoke slightly and create a burning odor, so take a few minutes to break in the new element. You're now readly to bake.
If you don't have a volt meter, turn stove/oven "ON" with lights indicating that stove/oven is ON, turn circuit breaker off and watch indicator lights go "OFF" when circuit breaker is tripped.