Abstract: A premold insert for securely mounting a light source within the female connector of an extension cord. The premold insert is positioned over the hot blade receiving terminal, the neutral blade receiving terminal, and the ground receiving terminal of the female receptacle. The light source is positioned within said insert such that when the insert is mounted to the terminals, the light source is secure and will not be damaged when the light-permeable plug is molded. By securing the premold insert, and hence the light source in this manner, the light source is more resilient to stress and strains. The insert acts as a shock absorber which limits the damaging effects of mechanical stresses on the light source.