A high-density fiber optic connector configured to operate with a first optical fiber cable, a second optical fiber cable, and a dual fiber optic cable adapter, is provided. The high-density fiber optic connector comprises a two-piece connector housing configured to open and close and form first and second housing through ports, first and second sub-assembly housings, and a push-pull tab. When the two-piece connector housing is opened, the first and second sub-assembly housings can be manually interchanged, such that the first sub-assembly housing is engaged and fixed in the second housing through port and a front end thereof is coupled to a second receiving port of the dual fiber optic cable adapter and the second sub-assembly housing is engaged and fixed in the first housing through port and a front end thereof is coupled to a first receiving port of the dual fiber optic cable adapter.