Turn off the oven if it is on and let it cool.
Lift up the cooktop and check if the plate is at the right front of the burner box.
Pull out the storage drawer if you don’t find the metal plate in the burner box. Look for the plate on the oven frame behind the storage drawer.
Take a picture of the plate containing the oven's model number, and write down the model and serial number on your owner’s manual for future reference.