Abstract: An electrical connector system which has several independent housing sections. Locking elements are formed onto a first housing section and extend through openings into the retaining chambers of an adjacent housing section. In order to create an electrical connector system which, starting from one housing section, is capable of being extended in various different ways through the connection of further housing sections, one of the independent housing sections is formed as a central housing. At least two other housing sections which are directly allocated to it are formed as satellite housings. The locking elements formed onto the central housing engage on the one hand in the retaining chambers of the first satellite housing and on the other hand in the retaining chambers of the second satellite housing.