An insulation displacement connection system, for example a connection system of the "IDC" type, comprising: a) a connection terminal; b) a pocket suitable for accommodating said connection terminal; c) an enameled wire spirally wound and at least partly accommodated in said pocket, wherein the pocket comprises a pin on which said wire is wound, and wherein: - the pin is delimited by side walls (87, 89) which support the enameled wire during the winding of the wire onto the pin, the pin further comprising a midplane (M-M) and said midplane (M-M) preferably also being a plane of symmetry for the pocket, characterized in that: - the pocket is frontally delimited by the pin, at the back by a rear wall and laterally by a pair of side guide walls (91, 92) suitable for guiding the connection terminal during the insertion thereof into the pocket, - the connection terminal is provided with a single tab shaped to elastically intercept the pin so as to exert an abrasive action on the enameled wire during the insertion of the connection terminal into the pocket and so as to elastically bias the wire to abut against the pin upon the insertion of said terminal into the pocket, thus ensuring the electric connection between the single tab and the wire, - the single tab comprises an outer side suitable for intercepting the wire, said outer side having a shaped surface which directly interfaces with the enameled wire, said single tab further comprising a terminal midplane (M'-M') suitable for being coplanar to the midplane (M-M), - the pin, the rear wall and the pair of side guide walls (91, 92) delimit a cavity for accommodating the connection terminal, in particular the tab. a) a connection terminal; b) a pocket suitable for accommodating said connection terminal; c) an enameled wire spirally wound and at least partly accommodated in said pocket, wherein the pocket comprises a pin on which said wire is wound, and wherein: - the pin is delimited by side walls (87, 89) which support the enameled wire during the winding of the wire onto the pin, the pin further comprising a midplane (M-M) and said midplane (M-M) preferably also being a plane of symmetry for the pocket, - the pin is delimited by side walls (87, 89) which support the enameled wire during the winding of the wire onto the pin, the pin further comprising a midplane (M-M) and said midplane (M-M) preferably also being a plane of symmetry for the pocket, characterized in that: - the pocket is frontally delimited by the pin, at the back by a rear wall and laterally by a pair of side guide walls (91, 92) suitable for guiding the connection terminal during the insertion thereof into the pocket, - the connection terminal is provided with a single tab shaped to elastically intercept the pin so as to exert an abrasive action on the enameled wire during the insertion of the connection terminal into the pocket and so as to elastically bias the wire to abut against the pin upon the insertion of said terminal into the pocket, thus ensuring the electric connection between the single tab and the wire, - the single tab comprises an outer side suitable for intercepting the wire, said outer side having a shaped surface which directly interfaces with the enameled wire, said single tab further comprising a terminal midplane (M'-M') suitable for being coplanar to the midplane (M-M), - the pin, the rear wall and the pair of side guide walls (91, 92) delimit a cavity for accommodating the connection terminal, in particular the tab. - the pocket is frontally delimited by the pin, at the back by a rear wall and laterally by a pair of side guide walls (91, 92) suitable for guiding the connection terminal during the insertion thereof into the pocket, - the connection terminal is provided with a single tab shaped to elastically intercept the pin so as to exert an abrasive action on the enameled wire during the insertion of the connection terminal into the pocket and so as to elastically bias the wire to abut against the pin upon the insertion of said terminal into the pocket, thus ensuring the electric connection between the single tab and the wire, - the single tab comprises an outer side suitable for intercepting the wire, said outer side having a shaped surface which directly interfaces with the enameled wire, said single tab further comprising a terminal midplane (M'-M') suitable for being coplanar to the midplane (M-M), - the pin, the rear wall and the pair of side guide walls (91, 92) delimit a cavity for accommodating the connection terminal, in particular the tab.