Ordered replacement part which arrived overnight ( shipped lease expensive way).
disconnected electric and gas. opened back of oven to disconnect wire of old igniter.
removed old igniter from inside the oven by loosening screws of shield (which were tightened
by nuts from underneath. pulled out ignited and inserted new igniter and put into oven with wires
going to side of oven ( Attached wires with - wire nuts which had been attached to old igniter wires.
screwed up back of oven . plugged in electric cord and turned on gas. turned on oven and all
is working. (video from appliance parts was helpful.)