To start, I removed the door which lifted off easily, then removed the plate in the oven which was in place with 2 screws, and removed the bottom drawer which lifted out once it was fully pulled out. Then I removed the two screws (one with pliers) which held the old igniter on and wiggled the plastic harness connector out of the hole in the back of the oven. Under the oven where the drawer used to be. Then I disconnected the plastic harness from the power source, being careful not to let it slip back through the hole.
The new Oven Igniter fit perfectly and I threaded the harness through a crack in the back of the oven and then down underneath where I was able to reconnect the harness to the power source, then crammed it back through the hole where it is probably protected from the heat of the oven.
One of the screws that held the igniter on was stripped when I finally got it off with pliers, but I got a slightly bigger screw from my vast but somewhat unorganized collection of random screws and tightened it down.
When I tested the oven, it worked perfectly the first time and lit the burner much quicker. After taking this opportunity to clean up some ashes and burned pizza cheese from the bottom of the oven plate, I put all the pieces back in and this successful project was complete!