Connector, Connector Assembling System and Method of Assembling a Connector

An electrical connector is presented, including a plurality of connector wafers coupled by a coupling piece, each wafer including a housing accommodating a plurality of contact elements, said housing having opposite side edges, an insertion side exposing the contact elements, a back side and opposite main faces. The connector wafers are provided with first coupling means extending along at least a portion of a side edge thereof. The coupling piece is provided with second coupling means extending along at least a portion thereof. The first and second coupling means are arranged for engaging each other, in a coupled situation, on a plurality of distinct engagement positions along the respective coupling means.