Slide the stove away from the wall, so there is enough room to work behind it.
Hold the stainless steel panel against the wall, so the bottom of the panel is level with the countertop.
Mark the location of the screw holes onto the wall by tracing them with a pencil.
Drill pilot holes into the wall where you had marked the screws in pencil. Do not drill any deeper than the length of the screws.
Place the stainless steel panel against the wall, lining up the screw holes in the panel with the holes that you just drilled into the wall.
Secure the panel to the wall by inserting screws through the holes in the panel and screwing them with a screwdriver into the pilot holes in the wall. Carefully push the stove back into place.