How do you wire fuel gauge for 72 beetle?

To wire the fuel gauge for a 1972 Volkswagen Beetle, connect the gauge's positive terminal to the ignition switch's 12V power source. The negative terminal of the gauge should be grounded to the vehicle's body. Connect the fuel sender unit's wire to the gauge's sender terminal, and ensure that the sender is properly grounded as well. Always consult the wiring diagram specific to your model for accurate connections.