An electrical fitting adapted for insertion from the interior of an electrical box in order to provide a secure means for attaching an electrical cable to the box. The electrical insider fitting includes a connector body having a leading end, a trailing end, and a base flange on the trailing end. A leading face is included on the base flange and a seat on the connector body adjacent the leading face of the base flange. A snap ring resides in the seat and includes one or more outward extending locking tangs. The leading end of the connector body includes an internal bore with an internal snap ring secured therein. The internal snap ring includes one or more cable retaining tangs for engaging and securing an electrical cable to the leading end of the connector body.