A fall arrest anchorage system for use with a female retaining receiver having grooves or side apertures for engaging connector. The system uses an elongated male connector having a first end and a second end that extend along a connector axis, and a first section of a first dimension and a second section of a second dimension. The first dimension is larger than the second dimension, and the first section will be positioned closer to the first end than the second section. The male connector also includes at least one of a first retractable protrusion on the first section and at least one of a second retractable protrusion on the second section, the first retractable protrusion being positioned along the male portion such that the first retractable protrusion will cooperate with the first groove in the receiver when the second retractable protrusion engages the first groove.