1968 Dart fuel sender replacement

[Dana67Dart]

Do you have a link to the section on how to repair that tip?

OEM Fuel Sender Repair 1967 Dart

 

[Dana67Dart]

I didn't know if it maybe had a little silver contact there like the ones on breaker points or not

I don't think so, I suspect it had a dimple pressed into the OEM sweep.

I suspect you are well versed in soldering from your descriptions BUT I can not stress the virtues of the right flux!