Its just until I get a real connectorYes this should work fine. I don’t love crimp connectors for long-term use and I’m sure Coolerman has what you need - but all you really need is a spade or bullet connector to get the sender talking to the gauge.
If this was some “mission critical” component I’d recommend getting a more secure connection but if the crimp doesn’t hold or the spare terminal disconnects you just lose the gauge - not the end of the world.