Hi,
Here’s a link to the [https://i.sears.com/s/d/pdf/mp-tc/10011702/prod_1563979612|parts list] for your oven. Download the list and then scroll down to find an exploded view of all the parts and part numbers
The [https://www.amazon.com/Frigidaire-5304488359-Microwave-Manufacturer-Electrolux/dp/B001VMFDAI|fuse -example only] (Item #24, part #5304488359)appears to be mounted on the right side air guide duct (Item #44).
Here’s an image taken from the list manual that show where. The fuse is indicated by green arrow and the air guide duct is in red.
[image|1564952]
(Click on image to enlarge for better viewing)
Hopefully this is of some help.