We recently blew the fuse for the accessory power ports on our X, due to a failed Tesla tire pump (which evidently had an internal short and blew the car's fuse when connected).
When that happened, immediately tried to look for the fuse, so I could replace it - and found that Tesla doesn't document the fuse locations. There is a fuse block in the frunk, but it's not labeled. And the fuse for the accessory sockets isn't there - it's in a different fuse block located inside the dash.
Fuse locations have been documented for every ICE we've owned - Tesla doesn't provide this information in the owner's guide, and I could not get it from Tesla over the phone to replace the fuse myself. Instead, Tesla wanted the local service center to replace the fuse - and also verify we didn't have a problem with the car's systems.