You should be able to see some kind of opening into the cavity of the stove. The thermocouple usually looks about 1/8" diameter rod and should go into the inside of the oven a few inches. If you can pull the stove away from the wall look on the back for the wiring.
It could come thru the top under the cook top as well. Pop it up and take a peek. Open up the bottom broiler pan and look there as well.
I am working off a general idea of how the ovens we use here are controlled w/ a thermostat. Your home oven is going to be different. My home oven is gas all around so it is different from your electric one.
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