I have a large electric grill, the plates that cook food don't heat up properly, someone seems to have pulled on the cord causing one of the connectors that connects to the plate thermostat to come loose. It appears to have been forcefully melded with the thermostat, which I can't duplicate.
It looks, from your photos, like the spade connector has slipped off. It's made to slide on with a little bit of force. It might need to be tightened with a pair of pliers before it will slide back on and stay. I wouldn't solder it on, in case you have to replace the thermostat at a later date. If you have to replace the connector, you'll need a high-heat spade connector, of the same size, and a crimper to attach it to the wire.
