The authors focus on the adjustment of coupling mechanism Rotation Universal Module that offers unlimited rotation of movement. The module has been designed to achieve different kinematic structures by use of an identical module. A unique interface mechanism, which has undergone several modifications and amendments, has been designed for this module. The main objective is to achieve efficient and more secure initial solution of connecting two adjacent modules. The amendments of primary solution that will contribute to achieve desired outcomes and smooth functioning of the entire device are described in detail.