Amp gauge question

My dart is a 76 sport and from what I can tell it has a shunt style amp gauge in it. There was only small wires (18 gauge or so) running to the connector that the gauge was connected to..there were no 10 gauge wires. Anyways I am in the process of replacing the gauges with autometer gauges. Can I just leave this connector disconnected (the big round gauge connector is where the wires are run though) or do I have to connect the wires together to bypass it?