I agree that the wire routing is not optimal. Note that the six screws holding the fuel level sender to the tank should have two copper washers under each bolt head. Garage Smell from Car Since that’s the case, I’d remove the sender, flip it 180 degrees, and reinstall it with two copper washers per bolt and using a good non-hardening gas compatible sealer on the gasket. If not concerned and it’s not weeping gas you could adhesively secure the wiring harness to the tank to give some strain relief. I just did mine last week…
Crappy aftermarket sender but the only one available that I could find…