Ok, here are the factory part numbers for your cooktop if you do not already have them.
Biscuit: W10110270
White: W10110269
Black: W10110271
Enter your part number in the two parts search boxs we have in the top left corner to find the best price online.
Looks like you would slide the range out from the counter.
Then remove the screws from around the frame that is under the glass edge.