I have two AP3782975 switches in hand for the x-low burners on a Thermador PCG304E/01 rangetop. I removed the star burners and stainless steel top but can't determine how to get to the switches behind the control knobs. It looks like everything inside is mostly a single piece for both sides/all burners, so would I have to remove the stainless steel front to get to them? I don't see any way to get to the switches without removing the entire inside assembly unless there's an easier way. I searched for a service manual or instructions for replacing the potentiometers but haven't found anything to this point. Would rather correct myself since I have the parts ready to install.