Little procrastination paid off. With only 50% capability I knew it is time to call the appliancepartspros. They shipped me parts within 3 days. It was practical to fix both at the time. All I needed was to disconnect power at range breaker box, grab a screwdriver to lift top open, a 16 inch or so piece of old 2×4 wood to keep the top top of stove lifted, so I could access heating elements from underneath. Then I took my black sharpie And marked location of mounting screws and connectors. Also since I own a smartphone :) I made picture of the underside, so I can reference it later if needed. Then I used my power screwdriver with a bit that fits the screws, thare all same size. With multiple wires, I always disconnect one wire at the time from old device, and install in the location on the new device. This way I don't get my wires confused, and never have to doubt whether I switched wires. As I connected wires to my new burners, I mount screws exactly as they were on my old burners. After I was done, I inspected my work, to make sure there is no bare , unconnected a wires hanging freely. Last thing was to lower the top, turn my circuit breaker on, test burners if they work. Finally, I attached the two mounting screws that hold top. They are at the bottom front of the top plate with burners. They sent me a cleaning liquid for $6 extra, and it helps in getting rid of some stains on the glass. It took me only 40 minutes to do it.