An electrical connector for a helmet-mounted night vision system, or other electronic device, is provided. The electrical connector includes a plug assembly and a receptacle assembly each including a body having a revolved surface and an electrical contact. A protrusion extends from the revolved surface of either the plug assembly or the receptacle assembly and a cam surface is defined along the revolved surface of the other of the plug assembly and the receptacle assembly. Upon engagement between the assemblies, the revolved surfaces of the assemblies are positioned to face each other and upon rotation of the assemblies with respect to one another the protrusion is positioned to move along the cam surface causing the electrical contact of the plug assembly to bear against the electrical contact of the receptacle assembly thereby establishing a connection between the plug assembly and the receptacle assembly.