Prefabricated Prefinished Volumetric Construction (PPVC) technology has emerged as a revolutionary building method, has garnered increasing global attention and adoption. Given the discontinuous nature of columns within PPVC structures, it becomes imperative to underscore the critical role that the reliability and efficiency of connections between modules play in determining the overall performance and stability of PPVC. This paper introduces an innovative FlexLock Connector which consists of lock cylinder, latch bolt, groove, corner fitting and gusset plate. The designed mechanism of the individual parts makes this connection adaptable to an eight-column, sixteen-beam system, allowing for quick installation and easy disassembly. Considering the potential challenges such as self-locking and geometric conflicts during the installation process of the proposed connection, this paper firstly elucidated the geometric constraints of the connection theoretically. Additionally, several finite element models (FEM) were developed and underwent a validation process conducted against 12 reported inter-module connection experimental results. Following this validation, a FEM was developed and underwent on installation process with the chamfer of the latch bolt falling within the range of the twice the friction angle (2φ) and exceeding the range of 2φ were both studied. Additionally, a total of 19 FlexLock Connector specimens were employed to investigate the tensile performance of the connection, varying parameters were selected such as the height of the strike plate (hlc), width of the latch bolt (wlb), diameter of the inner cylinder (Dic), steel grade of the latch bolt, height of the end plate (hep), height of the latch bolt (hlb), and steel grade of the corner fitting. The results identified five distinct failure modes of the proposed connection under tensile load, highlighting the contributions of key structural elements. Finally, a theoretical formula was proposed for the tensile bearing capacity of the FlexLock Connector, and validated through comparison against numerical results.